The Original Siren [A MTF Mermaid TG Story]

What's this? A prequel? What better way to cap of The New Siren's Ending than a look at how all this mermaid stuff got started...

Commissioned by cooolooo

Before the Atlantis University exchange program started, Merfolk were still a secret. Jessie, a merman scientist, is selected to go to the surface and make first contact with a human. Harry is shocked to learn mermaids are real but even more so when Jessie transforms into his ideal woman and starts seducing him! 

~

2005

Coral held up the little phial with a victorious smile on her face while the rest of the research team looked on. To any ignorant bystander, it would just look like a glass filled with silver liquid, but the team knew better. Jessie stuck to the back of the small crowd, on some level, he knew this was a momentous day but he couldn’t help but be distracted. His fingers twitched, and his eyes kept drifting to the screen and antenna they had sent up to capture surface signals. The Baywatch rerun was about to start any second now, and he didn't want to miss it. 

“This is a momentous day,” Coral announced, tail swishing back and forth in excitement. “Today is the day Merfolk may finally be able to connect with the humans on land.”

There was a cheer, Jessie joined in a second too late. His eyes were on the clock. Two minutes till air time…

“With these nanites, humans will be able to transform into Merfolk and vice versa.” Coral finished. “And with this completed, we can finally begin first contact.”

“Do you really think we can just offer these to a random human?” one of the other scientist’s chuckled. “That conversation will go well.”

“That was the other part of this announcement.” Coral beamed. “Some of the scientists on our surface adjacent labs have been looking into potential people to make first contact with. Of course, it would be nice if we could meet with somebody in government but humans have a lot of security around their leaders. Even if one goes swimming, we probably can't approach without causing a fuss, and that’s not what we want.”

Jessie felt her words starting to fade into the background. The clock had ticked past the starting time; the opening credits were probably finished by now. He wondered what the episode was about. He’d always been fascinated with human culture; it’s what led him to this job, but as a junior researcher, he didn't get to do much but test samples. 

The only real benefit was the television; Coral and her team wanted to learn more about human culture on the surface and had it hooked up especially. Jessie had taken to the shows more than anybody else; he loved watching Baywatch especially. Those shots of those strange, human legs running on the sand were fascinating. A lot of Merfolk found human legs ugly, especially compared to the glittering scales of a mermaid tail. Not Jessie though, he thought they were gorgeous. He wished he could run his fingers along the smooth skin of a woman’s leg, or feel the strong muscles of a male’s…

“Jessie? Jessie!”

“Wha? Oh, sorry bro, I must have drifted off.” He chuckled. “What was that?”

Coral put her hands on her scaled hips. 

“Don’t ‘bro’ me, I’m your superior. Jessie, this is a huge occasion, and all you can think of is that silly human soap opera?”

“It’s not a soap it’s-”

“Not what’s important right now.”

He shrunk back a little and nodded; he’d never been very dominant, despite being a male. He had always thought he’d transform into a woman by the time he reached puberty, but it never happened. Perhaps he hadn't met the right male yet. Either way, being a submissive male in a science role always drew eyes. Maybe that was why his pod had broken up; his girlfriends wanted somebody more dominant. They hadn't said it in as many words, but Jessie knew it was the truth. 

“Sorry, bro, uh, ma’am.”

“He’s watched so much of that show it’s fried his brain.” one of the others snickered and Coral laughed only to stop for a moment as if realising something. Her gaze turned back to Jessie with a new intensity, he felt a nervous shiver run down his spine as she looked him up and down. 

“It does present an opportunity…” She muttered. “Jessie, you’ve watched more human content than the rest of us combined. You know how they talk, how they like to be approached…”

The others started to speak up in disbelief, but Jessie felt a flutter of excitement in his chest. Could Coral be saying what he thought she was? 

“Look at him!” One of the others argued. “He’s plain and…well, he’s male!”

“So?” Jessie jutted out his chin defiantly. 

“So, humans expect mermaids to be beautiful, busty maidens. Like us.” The other scientists smiled smugly. “I think they will be more likely to listen to one of us, maybe even somebody with siren abilities to smooth the initial shock over.”

“I don’t think humans will appreciate somebody charming them in their first ever conversation.” Coral cut in. “From what I have observed, male humans tend to be…picky. They respond better to other males for the most part.”

“Why?” Jessie asked.

“Because for a long time on the surface, the females were subservient to men.” Coral shook her head. “Don’t ask me why, their gender ratio is even more equal than ours. But for whatever reason, many men still think women are inferior.”

“Ew.”

“Exactly, sad as it is, sending a male might be the right course of action.”

“You mean…I get to talk to a human!?” Jessie grinned, Coral nodded. “Yes! Awesome, this is absolutely fucking tubular! I can’t wait.”

The other scientists all shared worried glances, even Coral looked like she might be having second thoughts. They were just going to have to hope Jessie would rise to the occasion, and not talk like one of the characters from his shows.

~

“His name is Harry.” Sandy explained. “He’s a marine biologist, young, open minded and recently returned to the area. He’s a perfect fit.”

“What’s this place called again?” Jessie asked, struggling to keep up as they swam through the upper currents. 

“Newfoundland.”

“Weird name.”

Sandy shrugged. 

“Humans are a little weird.”

Jessie was buzzing with excitement. He’d never been this close to the surface before, normally he couldn’t even see it but now it was only a few hundred feet away. He could see the foam and sunlight dancing on the surface and the gradual incline that showed they were near shore. 

“Remember, this is a historic occasion, so don’t screw it up,” Sandy said seriously. 

“Yo, come on, trust me! I am just as excited as the rest of you.”

“I know, we just want you to take this seriously.”

“I’m totally taking it seriously.”

Sandy just raised an eyebrow and shook her head. That was the same reaction he’d gotten from most of the scientists up here. Nobody seemed to think Coral’s decision was a good one, but he was going to prove them wrong. 

“There is a beach up this way where he likes to swim. He often goes around those rocks.” She pointed, “And into a smaller, private cove. That will be a perfect first meeting spot. I’d swim up and get a closer look before actually greeting him, though.”

“Good idea.” Jessie grinned. “Wish me luck, thanks for the help, bro!”

“Poseidon, help us…”

Jessie pretended not to hear that last part. 

He swam upwards toward the light and hesitated just before the surface, he’d never been in the air before. He took a deep breath in through his gills and surfaces. It was such a strange feeling, having his hair flatten against his skull and the drips run down his face. After a bit of blinking, his eyes adjusted, and he saw the cover Sandy had spoken about. And the man. 

He was about Jessie’s age, with a muscular build and tanned skin. His hair was a colour somewhere between blonde and brown, and even from a distance, Jessie could see an intelligent shine in his brown eyes. He was handsome, that was for sure. He was sitting on the sand with water dripping down his torso; his gaze focused on a crab climbing a nearby rock. 

Jessie watched as the man, Harry, held out his hand and gently coaxed the crab onto it with a soft smile on his face. Jessie could tell why this guy had been chosen; he clearly loved ocean creatures, what marine biologist wouldn’t jump at the chance to meet a merman?  Suddenly, Harry turned toward the waves and Jessie barely had time to duck under the water. He swam down deep, watching as Harry glided across the surface of the water, swimming in strong strokes on his way home. 

“Soon, bro.” Jessie grinned. “We’re gonna make history together.”

~

The water was cool and fresh as Harry dove into the waves. Most people thought the water here was too cold, so he had the beach to himself most days. The trick was to dive right in, none of that slow walking to acclimate, head first and the cold didn’t seem so bad after a few seconds. 

He broke the surface and turned to float on his back, swimming lazily through the salty water on the way to his favourite place. While he had the beach to himself most days, all it took was one family with a noisy kid to ruin the peace. Luckily, he’d found his little getaway.

The cove was small, just a little spit of sand surrounded by high sea cliffs and a few rockpools; it wasn’t much, but it was his. Nobody ever came here, he was even able to leave a bag with a few things, so he didn’t need to worry about keeping his stuff above the surface while he saw each time. The best part, though, was the little cave. It didn’t lead inland very far, but far enough for him to set up some beach chairs and a little fire pit to keep warm if the wind got too cold or it started to rain. After years at university, sharing dorm bathrooms and never having enough space, the little cove was his own slice of paradise. 

He clambered out of the spray and sat down on the sand, breathing in the salty morning air. Peace and quiet; perfect. 

“Hey, bro!”

The voice was such a shock to his system Harry flailed, almost falling over in the sand. He looked to the cave, expecting to see a stoner come to ruin his little patch of Heaven, but there was nobody there. 

“Huh…?”

“Over here!”

He turned and saw a face bobbing in the water. It was a guy his own age with dark hair plastered to his face and a wide grin. He waved, and Harry reluctantly waved back; maybe if he was nice, the swimmer would leave him in peace. 

“Hey!” He smiled. “Enjoy your swim!”

“I am, um…what are you up to?”

Oh God. One of the best things about being out here was avoiding small talk, how had it managed to follow him?

“Just relaxing,” Harry replied. “I was just going to study some local creatures but they don’t like noise so…”

He let the suggestion hang in the air but the swimmer didn't disappear. In fact, he was getting closer.

“I’m Jessie.”

“Harry.” He replied through grit teeth. “I’m a marine biologist and I really want to get this job that’s coming up so if you wouldn’t mind, I’d really like some quiet so I can encourage some of the sea life to come out?”

“Don’t worry, I’m already here!” Jessie grinned, he must have been sitting in the water now because his torso was above the waves. Harry was about to ask a little less politely when he noticed the bag his new companion had slung over his shoulder. It was woven from green kelp, with a clasp made from stone and shell pieces. Jessie must have noticed him staring because he hefted it into the air so Harry could get a better look.

“Like it? It was a long swim from Atlantis, so I had to pack light.”

Harry blinked, then laughed.

“Hah! You almost had me going for a…second…”

His voice trailed off as Jessie dragged himself out of the waves and up onto a smooth rock at the water’s edge. His hips were scattered with scales that spread all down his tail, yes, tail! They were a deep olive green colour that caught the light, with a large translucent fin right at the end. Jessie was grinning, letting his tail flex and relax a few times as if to prove it was real. 

“What?” Harry baulked. “How did you…? That’s one hell of a costume.”

“No costume, bro. I’m real as. Come see.”

He took a step closer, looking for seams or any other signs that this was a trick. Jessie didn't try to hide, in fact he stretched out to show off the tail. 

“Feel free to touch.” He laughed. “I know you want to.”

“You make that sound way more suggestive than I want it to.”

Jessie just chuckled and stretched his tail out for Harry to touch. He ran his hands over the scales; they felt like a fish’s or snake's. 

“No fucking way.”

“Cool, right.” Jessie grinned. “I feel the same way about your legs. Freaky. Do all guys have hair on their legs?”

“Most.” Harry blushed, was it that noticeable? 

Jessie flopped back on the rock and explained why he was here. The idea that somewhere beneath those waves were not only entire cities but research labs where they were developing nanites so humans could experience life under water was…insane. And yet, the proof was lounging in front of him like a particularly pleased seal. 

“You’re not what I imagined an ambassador to be like,” Harry admitted. “Why me? I’m nobody important.”

“Well, your important leaders don’t exactly go into the ocean. Well…not since that incident with Harold Holt.”

Harry decided to put a pin that that discussion for a moment. 

“So what, you picked me because I hang out alone near the ocean and know about fish.”

“Basically.”

That was simultaneously flattering and deeply insulting. 

“So…this is the first conversation between a human and a Mermaid? Ever?”

“Merman. But, Officially, yes.”

“...I feel like I shouldn’t be wearing a speedo.”

Jessie snorted.

“Maybe not. Then again, maybe I should be saying more diplomatic stuff like…I dunno, I come in peace.”

“That makes it sound like you’re an alien. Wait, are you an alien? Are mermaids aliens?!”

“No! Bro, maybe you’re not as smart as I thought.”

“I’m sorry, I just found out mermaids are real, I’m open to anything right now.”

Jessie just laughed and shook his head in disbelief. It was so strange, if it weren't for the tail, Harry could almost believe he was talking to one of his college friends. Jessie just seemed to…normal. 

“Well, I’d better get back in the water, all this air is making my scales itch.” 

“Wait, that’s it? Should a first contact have more fanfare?”

Jessie shrugged.

“My boss, Coral, mentioned something about building rapport and gaining knowledge through cultural exchange. Which I think is just her way of saying, get to know each other and learn more.”

“So we’re just gonna…hang out?”

“Yup!” Jessie flopped back into the water like a limp fish, with none of the grace Harry would have expected and cold water splashing over his legs. “See you tomorrow!”

Bewildered, Harry held up a hand and waved as Jessie disappeared under the waves.

“See you tomorrow…”

~

Tomorrow turned into the next day, and the day after that. The novelty of meeting a merman wore off, and soon, it just felt like he was hanging out with a friend. Thanks to some waterproof bags, Harry brought a pile of notebooks to the cove and started writing down all the information he could about Merfolk and their culture. 

Hearing about their skewed gender ratios and polyamory was certainly enlightening. Harry was especially glad for the cold weather, so Jessie didn't see just how interesting he thought it was. Harry couldn’t imagine growing up having that as the norm; three mothers and a single father. Apparently, some pods didn't even differentiate between a birth mother and ‘other’ mother; Jessie wasn't sure which of his mothers had given birth to him, nor did it seem to matter. 

“So all those old stories of sirens luring men to their deaths is real?”

“More or less, though Merfolk stopped the whole purposefully dashing ships against rocks thing hundreds of years ago. Most of the time they just lured ships away from Atlantis and the sailors were none the wiser.”

“Crazy, most people these days think the legends of mermaids came from sailors seeing manatees.”

“Manatees! Those fat things? I am insulted!”

Harry couldn’t help but laugh at the look of utter horror on Jesse's face. Then again, if their positions had been reversed and he’d been compared to a water cow he would probably feel the same. 

“It’s just nuts to think all those legends and kids stories are true…do you have legends about humans?”

“Sure, a bunch.”

“Like…?”

“Well, is it true that humans only have one partner for life?”

“Sort of. A lot of people have multiple wives and husbands, just not at the same time.”

“If you’re going to have multiple partners, why not just save time and date them all at once?” Jessie said in confusion. “It seems like humans waste a lot of time.”

“It’s just how we’re wired, besides, with a group, what if somebody is the favourite, wouldn’t you get jealous.”

Jessie shrugged.

“Everybody is loved and cared for, so why complain? Face it man, our way is better.”

“So, do you have a, what did you call it, pod?” 

“Nah, I had two girlfriends but we ended things. Mutually of course…” Jessie chuckled, “But what about you? No ladies in your life?”

“Bit rude to assume, don’t you think?”

“Dude, you spend every day here, alone.”

“...point taken.”

Jessie rolled over so that he was laying on his back, arms behind his head and tail dangling in the water. Harry couldn't help but notice his chest seemed a little bigger.

“Do you have gyms underwater?” He asked.

“What? Yeah, I suppose, never been much of a gym guy myself, but I bet you are with those guns.” 

He pointed and snickered at Harry’s arms; he was pretty well-muscled.

“That’s just from swimming, I just asked because you seem to be gaining some muscle in the chest.”

Jessie rolled back onto his stomach and blushed. 

“That’s not….uh, that’s a Merfolk thing. I’ll explain some other time.” he cleared his throat. “Back to it, who would your ideal girl be?” 

Harry snorted.

“I don’t think this is the kind of thing your head scientist wanted you to talk about.”

“So? Come on, it’s just for fun.”

Harry had dated a handful of women since his early teenage years. None of them had really stuck out as anything special though. Oh, they each had a handful of desirable traits, but none of them seemed to have the full package. 

“A girl who’s…relaxed. Like one of the guys, y’know? Not too girly except where it counts.”

“You mean the boob department?”

“Yes, of course, I mean the boob department!” Harry felt his face getting hot, and Jessie laughed.

“If all you like is big boobs, you should come to Atlantis. Most mermaids are, at the very least, a D cup. I didn't even know boobs could get smaller on fully grown women till I started watching your television shows.”

That made Harry grin; the last thing he’d expected from a merman companion was an absolute obsession with Baywatch of all shows. 

“So every woman down there is like, at least Pamela Anderson?”

Jessie nodded, and Harry’s mind immediately filled with images of busty mermaids. He crossed his legs as naturally as he could manage for the sake of dignity. He wondered if it would be weird to ask for a sample of those nanites and quickly decided it would be. Plus, if he had a tail how would he even go about having a fun time with one of those lovely mermaids? 

“So yeah, big boobs and one of the guys. A real tomboy, y’know?”

“Tomboys aren't just guys with tits, you know,” Jessie said somewhat defensively. 

“I know, I know.” Harry defended. “I just…I don’t like girly stuff, I hate make-up clogging my sink, and having to sit through rom com. I just want a nice girl with a good figure who I can watch the swimming with, and who isn’t going to make me watch Fifty First Dates, three times.”

“What’s that?”

“A chick movie, don’t worry about it.”

Jessie screwed up his face in confusion.

“Are films about birds really that popular with your females?”

Harry blinked for a moment before breaking into fits of laughter. 

“No, no, it’s a girl movie. Chick is just slang.”

“Huh, interesting.”

Jessie pulled out a notebook of his own and quickly jotted it down. Along with a few other words, Harry leaned over and felt his face go hot.

“Why are you writing down my dream girl's details!? Aren’t those notes for your boss?”

“Haha, nah, these are just for me.”

“I don't see how me liking tomboys with big boobs is important…” Harry felt his cheeks burning now; he probably looked like a tomato.

“You’re weird, bro,” Jessie grinned, snapping his book shut. “But I can work with that.”

“What the hell does that mean?”

Jessie didn't elaborate, he just winked and rolled himself back into the ocean without so much as a goodbye. Harry watched him disappear beneath the waves and shook his head in disbelief. Just when he was starting to think, mermen and humans weren’t so different. Then again, maybe it was Jessie that was the weird one. He’d just have to wait and find out. 

~

The next day came, and the sun scorched down on Harry’s shoulders as he removed his shirt. There were actually a few other people on the beach today, and he wondered if that would mean there would be no visit from Jessie. On the one hand, it might be nice to have the area to himself again, on the other, he’d gotten used to these daily visits over the past month. 

He dove in and began swimming, enjoying the cool water as it took the heat from his skin. As he approached the cove, he dove down and opened his eyes under the water; salt stung at them, but he could see the underwater world. He’d never known there was a kelp forest this close to the shoreline, a perfect hiding spot for Merfolk to observe humans, apparently. It was crazy to think that somewhere in all that weed, was a building, where scientists were working. An outpost, according to Jessie. Harry wished he could swim down further and see it, maybe one day, he could with the help of those nanites. 

Suddenly, there was a flicker of green; a tail shimmering in the filtered light caught his eye. His vision was blurry, thanks to his weak human eyes, but he made out the shape of a mermaid heading for the cove. He grinned and immediately regretted it as salt water flooded his mouth and headed for the surface. 

He burst through and spluttered a little as he rubbed his stinging eyes. He dragged himself up on shore, and opened his mouth to greet his friend, only to freeze in shock; now he had a whole new reason to rub his eyes that had nothing to do with salt. 

Relaxing on the sand, with her head propped up on her elbow, was a gorgeous mermaid. She had the same shimmering green tail as Jessie, but somehow more beautiful. Her hips were wider, and the sides of her tail sported flowing translucent fins. She had an athletic body type in all places but one. A pale pink seashell sports bra barely supported her massive chest, and they jiggled as she shifted on the sand. Her hair was short, dark and spiky from the water and her full lips smiled coyly as he approached before giggling, clearly delighted with how completely taken aback he was. 

“You can pick your jaw up off the floor now, bro.”

Her voice was light and playful but there was no mistaking that way of speaking. 

“Are you…Jessie’s sister?” 

The mermaid just laughed and ran her hand through her spunky hair. The movement made her arm brush against her breast, lifting it ever so lightly and causing it to drop. The movement was small, but it still made her whole chest wobble. Harry had to will his eyes to focus on her face. He wasn’t normally such a horn dog but…damn. She was perfect, utterly, physically perfect. 

“I’m Jessie.” She said as if it were the most obvious thing in the world and not completely fucking insane. 

“What are you talking about you’re not Jessie you’re…”

“A, what was the word…chick?”

“Yes!”

The mermaid rolled over onto her stomach and winced before immediately sitting up again.

“Ow…”

She rubbed at her chest, moving them back and forth as she did so. There was no way she didn't realise what she was doing, right? Harry steeled himself, willing his cock not to go up. It was getting more difficult with each passing second, though. That seashell bra was threatening to snap at any moment and if that happened he’d probably have to jump back into the cold ocean to preserve his dignity. 

“So I told you about how Merfolk have a skewed gender ratio, right?” She continued. “Well, that’s maintained thanks to our metamorphic gene. Anytime there are too many males in one place, or we’re around significantly dominant males, we transform into females.”

“Like clown fish?” Harry sputtered and Jessie gave him two finger guns. 

“Exactly, dude!” 

He leaned back in the sand and smiled. 

“I guess hanging out with you all day every day, was getting my metamorphic gene running, so I focused real hard on your dream girl idea and tada! Now you have her, mermaid edition.”

Harry’s heart skipped a beat.

“You can will yourself to look however you want?”

“Not normally; it’s a pretty rare skill actually.” Jessie replied with pride. “And considering this is my first ever change, I think I did pretty well.”

“I’ll say…” Harry said before slapping a hand over his mouth and going bright pink.

Jessie just giggled in delight and shook her chest back and forth a little. 

“So you like what you see, then? Wonderful. There is one more surprise in store.”

Harry’s mouth was already completely dry; he wasn't sure he could take another shock. At least not without maintaining his dignity. Jessie pulled out a small phial from her bag, it was filled with a silvery, viscous liquid that moved almost like mercury. 

“These are those nanites I told you about, the ones that will hopefully let Merfolk and humans swim a mile in one another's tails.”

“And you want me to take them?” Harry asked, blood rushing in his ears.

“No, silly! I’m gonna take them, I just wanted somebody around to make sure this all goes smoothly.”

Without another word, he downed the liquid like a shot and slammed the empty phial into the sand with a grin. 

“Man, I hope these work or things might start to get awkward.”

“Only start?”

Jessie chuckled but then gasped in shock. Her eyes went wide, and for a brief moment, Harry felt himself panic. If something went wrong, what was he supposed to do? He couldn’t exactly take her to a hospital. Then, Jessie smiled and shivered in delight.

“Oh…this actually feels sort of nice.”

“What’s it like?” Harry asked, dropping down on the sand next to her in fascination. 

“I can feel my scales receding, oooooh and…oh my pussy the scales are going away, the ones that keep it hidden.”

So that was how Merfolk had sex. If he weren’t so drawn in by the way Jessie’s mouth formed a perfect O each time she gasped, he’d probably be taking notes. He looked down and gasped, it was true, Jessie’s tail was slowly shifting, a divet appeared in the middle that got deeper and deeper until it split into two legs The long fronts seemed to seep back into the scales and the long flipper tail split in two before slowly changing into the shape of feet. Finally, scales began to disappear, slipping back beneath the pale skin that was emerging.

“Does that hurt?”

“No, but it does feel a little weird.” Jessie winced.

Harry watched as more and more skin appeared, then, a realisation dawned on him.

“Uh, Jessie.”

“Yeah, bro.”

“You’re not wearing any pants.”

“Yeah, why would merfolk wear….ah.”

There was nothing either of them could do about it now though, the change was almost finished. Harry saw dark hair sprouting from the V between Jessie’s legs before quickly looking away. Not that looking up helped much because then he was face to chest with Jessie’s heaving breasts. 

“It…worked.” She whispered. “Holy shit I have legs! Check these babies out!”

She lifted one in the air dramatically and laughed, wiggling her toes.

“Oooh, that’s so weird! There are so many of them.”

Her leg was only a few inches away from his face and Harry thanked every God in existence he didn’t have a foot fetish because that might truly send this teasing over the edge. 

“Right well, maybe I should go get you some clothes,” he said, not meeting Jessie’s eyes. “There is a thrift store not far from here, I could walk and be back in twenty.”

“While I just sit here?”

“You can go hang in the cave, my little secret base is in there-”

“And how exactly do you plan on me getting there?”

Harry paused. Of course, Jessie wouldn’t know how to walk. 

“You could drag yourself?” he suggested meekly and Jessie rolled her eyes.

“I don't have scales protecting my vagina anymore, bro. I am not dragging myself across the sand, what a thing to suggest to a lady! Maybe I was wrong, you’re not single because you're picky, you’re just an idiot.”

“Hey!”

Jessie grinned, and Harry finally registered her tone; oh, a joke. Obviously. 

“Come on then. I guess I need to teach you to walk.”

He offered an arm to Jessie and she awkwardly grabbed hold and let Harry get her to her feet. She wobbled, clinging to him the whole time so that her upper body was pressed against him. Harry could feel the seashell sports bra pressing up against him. The elastic seaweed holding the shells in place was straining against his side, and he tried very hard not to think about it. 

“Woah, this balancing thing is harder than I thought.”

“Take it slow,” Harry said gently.

He waited a moment before reluctantly loosening his grip and stepping away. Jessie’s arms flailed, and she wobbled on the stop, only just managing to keep herself from falling over. 

“I’m not sure I’ll ever get used to these legs, bro.” She said, her voice a little breathless. “How do you… move like this all the time?”

“You get used to it. One step at a time.”

Jessie took a deep breath and then took a faltering step forward. Her arms flailed and she teetered for a second before falling forward and catching herself on her hands. Ass straight up in the air. Harry spun around on the spot, but it was too late; he’d seen that perfect, pale butt, and now the image was burned in his mind. Her legs had been spread as well, and for the briefest of moments, he’d seen the dark pink outline of her pussy lips. 

“I’m good!” Jessie laughed, and Harry turned back to see her on her feet again, walking falteringly toward him.

With a great deal of effort, he kept his eyes on her face and held up his arms in case she fell. Jessie took a few more fumbling steps forward, her body half bent over to keep her balance. Harry was amazed she wasn't falling over, thanks to the weight at her chest, it was all he could do to stop from staring at the swaying tits as they moved back and forth. 

“That’s it, here, I won’t let you fall.” He said, and Jessie took a few more steps forward before falling right into his arms. 

“Oopsie! This walking thing is harder than it looks.” She giggled.

Harry could feel her body pressing against his, the softness against his hard chest. God, this was like torture. Even knowing this was his surfer bro merman friend, his body didn’t care. 

“Let’s try again.”

After almost an hour, Jessie’s steps started to become more confident, and she spun on the spot with a giggle. 

“This is so fun! It’s uh, getting a little cold down there now.”

Harry felt his face burn bright red; were Merfolk always so open about how their bodies were feeling, or was it just Jessie? 

“I’ll go get you some clothes, my treat!”
 “Aw, you sure know how to treat a lady.” Jessie cooed, and Harry laughed nervously.

It was good to get away, honestly, the trip up to the thrift store was short, but he was glad for the breather. He needed to get his head on straight! This was all so much. He’d only just gotten his head around mermaids existing, now learning they could change sex and that Jessie had turned himself into basically his perfect girl was too much. 

When he reached the shop and started looking through the racks, he realised, much to his embarrassment, he had no idea what size to get. He was going to have to guess but looking at the options, everything seemed so small. Their town wasn't big, the thrift shop was mostly still filled with 90’s knock offs, and that was when heroin chic was in. Otherwise known as androgynous, skinny-ass women with no curves. 

He lifted up a pair of jeans and groaned; Jessie couldn't fit a single butt cheek inside, let alone both! After an embarrassingly long time, he managed to find some things that looked like they would fit. Underwear was out of the question, of course, even he wouldn't buy bras or panties at the thrift store. Something told him Jessie wouldn’t mind going commando. 

By the time he returned to the beach, Jessie had swum over from the cover and was pacing, the novelty of walking must have worn off because she looked bored. 

“There you are! What are those?”

“Clothes.”

“There is barely enough fabric there to cover a quarter of a person.”

“Well, the body type you picked didn't leave me many options.”

Jessie shrugged, took the offered outfit, and began to get dressed with some difficulty. She ended up sitting on the sand and brushing it off her legs and butt when she finally stood up. The cut off jean shorts somehow made her look even sexier than when she was naked. 

“I don't think the bra will fit under this shirt.”

Harry turned to give her some privacy and listened as the sound of tinkling shells hitting sand met his ears. A few seconds later, Jessie tapped him on the shoulder and he turned. She was wearing the old Hooters singlet, and the owl's eyes seemed to stare into his soul. 

“This creature is so cute!” Jessie said ignorantly. “A hooter?”

“It’s an owl; Hooters is…. don't worry about it.”

Jessie shrugged and bounced on her new toes. 

“Alrighty! It’s time for our date.”

“Date!?”

Harry’s chest ached; his heart couldn't take another shock and yet they just kept coming. Jessie rolled her eyes and smiled ruefully. 

“Duh, bro. I mean, why do you think I did this? Because I love back pain?” 

“I just, d-didn’t know you felt that way about me.”

“Don’t flatter yourself, bro.” Jessie giggled. “You’re nice, you’re hot, and my metamorphic gene was kicking in. I’m not in love with you or anything, I am curious to experience a human date though, so come on, show a girl a good time.”

He held out his arm and grinned, and in an almost trance-like state, Harry took it. He wasn't about to say no to a date with a chick this hot, even under weird circumstances. 

“Oh, one more thing,” He said, reaching into his bag. “You probably need these.”

They were a pair of faded, strappy sandals. He hadn't been sure what to get her, considering she’d never walked before, but these seemed the best option, given that high heels probably would have made walking ten times easier. Jessie put them on, giggling a little as she struggled to get the ring of the sandals around her big toe. 

“Alright, let’s go on our date!” Harry announced nervously, trying to think of anything in his little town worth seeing. “Time to show you what the human world is all about!”

~

Jessie had never imagined that walking on land would feel quite like this—awkward yet exhilarating. It was less like swimming and more like falling, but stopping herself each time. Her new human legs wobbled a bit as she navigated the streets of the small town, but her arm around Harry’s meant she wouldn’t fall flat on her face at least. 

“You look… you look amazing,” Harry said after a few minutes, “I should have said that before.”

Jessie tilted her head, a playful smirk tugging at her lips. 

“Of course I do, I’m your perfect girl. I thought it would make things easier for you, since humans are such prudes.”

“I guess we are compared to Merfolk.” He let out a soft chuckle, his face flushing slightly. 

Jessie giggled; the way his cheeks turned pink was absolutely delightful. She couldn’t help but enjoy the effect she had on him. Being female for the first time and human was all so new and she wanted the full experience with everything that entailed. 

After walking for a while, they reached what looked like a little cafe with tables and chairs covering a small patio. Harry pulled out a chair for her, and Jessie, still not used to the whole sitting thing, hesitated momentarily before gracefully lowering herself onto it. Having a plush ass was quite helpful on the hard plastic seat. Harry sat across from her, still looking slightly flustered by the date idea. It was cute; she couldn’t wait to press more of his buttons. She had watched plenty of dates on those human TV shows, she was sure she could muddle her way through it. 

The menu was a mystery to her, but Harry quickly began to explain what was what. 

“This is poutine,” he said, pointing to a dish that appeared to be a mound of fries with cheese curds and gravy on top. “It’s a local favourite. You might like it.”

“I’ve seen french fries on TV…but gravy and cheese whats?” Jessie screwed up her nose. “It doesn’t look very appetising.”

“You’re about to find out just how delicious it is,” he said, grinning. “Trust me.”

“Fine, but it better not make your breath stink.” 

She gave him a flirty wink and laughed as he choked on his ice water. After a few minutes the mound of fries was in front of them, and despite the appearance, they smelt divine. Taking one between her now dainty fingers, she placed it on her tongue.  Her eyes widened, the rich, savoury flavours exploding on her tongue. 

“Oh,” she gasped, grinning in delight. “This is incredible!”

“I knew you’d like it!”

As they continued to eat, Jessie couldn't help but sneak glances at him, noticing the way he seemed so at ease around her, though his blush never quite faded. It was like he would get lulled into a false sense of security as their familiar conversation started up, then his eyes would fall to her tits and suddenly remember she was female. It was cute and she couldn’t help but tease him a little, leaning over the table so that her heavy breasts rested against it. At one point, she even let gravy drip down onto her chest so that she could slowly, sensually, wipe it away with her finger then lick it clean. 

“So why marine biology?” Jessie asked after a moment. 

“I grew up by the ocean,” Harry said softly. “Spent my childhood swimming in the tide pools, learning about the creatures there. It was just natural for me to want to study marine life. I guess… I guess I’ve always felt connected to the water.”

“Maybe you could come down to Atlantis sometime if I get permission to use the nanites on you. We could have another date.”

His eyes widened, and then—just as she’d hoped—he blushed again, a deep shade of crimson flooding his cheeks. 

“I—uh, yeah. Guess so.” He cleared his throat. “Wow, you’re really laying on the charm, huh?”

“This is a date, remember. Besides, it’s just too fun to make you blush.”

Harry’s response was a nervous chuckle, and Jessie thought that, for all the scientific knowledge he had about the creatures of the sea, he knew next to nothing about the effect a mermaid could have on a human heart. And she didn't even have siren abilities. If the others had their way and sent somebody with real charm abilities, poor Harry would have been putty in their hands. The thought made a spike of jealousy run through her. 

With a wicked grin on her face, she decided to push a little further. “Tell me,” she said, her voice low and soft. “What do you think about… a mermaid with human legs? Is there anything in particular you’d like to do with them?

His breath hitched at the question, and for a moment, Jessie was certain he wouldn’t be able to form a coherent thought. 

“Ummmm, uh well. I…I…”

“Come on, Harry. You can tell me. You’re telling me you have your dream girl right here, and you can’t think of something else you’d like to do with her. Besides poutine?” 

Jessie batted her eyelids and felt her new pussy moistening. Teasing him like this was so much fun! Harry cleared his throat and fixed her with a sharp, intense gaze.

“I think I’d like to take you back to my place.”

Jessie grinned in anticipation. 

“Babe, I thought you’d never ask.”

~

Human houses were so strange and varied; Harry blushed when he unlocked the building, explaining that, technically, it belonged to his parents. He’d just finished college and hadn't found a new place to live yet. Luckily for him, though, they were out of town. Jessie stepped into the hallway and looked at the pictures on the wall; a small boy running through sprinklers, beach shots, high school graduation photos. Harry had the same dimple on his cheek in each one and the same wild grin. It was cute. Jessie also noted a section of wall that had less frames than the others, conveniently big enough for a person to be pressed up against. 

“We could go out into the garden maybe, or I could make you a coffee? Do mermaids have coffee? No, of course not, unless you sneak onto land somehow…” 

He was babbling, nervous. It was cute, Jessie knew just the fix for that. She fixed her eyes on his, effectively silencing him with a single look before striding forward and pressing her body against his, trapping him against that perfectly placed bare wall. Before he could overthink things, their lips were together. 

Kissing as a woman felt so different; her lips were so plump and sensitive it made her moan. Harry swallowed the sound as his own lips parted and their kiss deepened. Jessie could feel his heart thundering in his chest against her breasts. His arm wrapped around her back, palms spread across her new ass before giving it a tight squeeze. The sensations made her squeak in shock and delight; she couldn’t wait to see what else these new legs could do. 

She curled one around Harry’s, getting as close as she possibly could. The skin there was sensitive and tingly; was that normal? They continued to make out, but the tingling got stronger, and then she felt the sharp prick of scales growing through the skin. 

“Uh oh.” She moaned breathlessly. “I think I am changing back…”

“Fuck,” Harry groaned, she could hear the disappointment in his voice and the hardness against her new thigh. “I could carry you to the beach; it’s not far.”

“No way.” Jessie shook her head. “We have time; I want to finish what we’ve started.”

They fumbled their way down the hall, alternating kissing and touching until they almost fell into Harry’s bedroom. More scales were forming now, and Jessie could feel the urge to bring her new legs back together so they could fuse.

“You’re not going to make it much longer,” Harry said teasingly. “Come on, let’s get you out of those shorts.”

“You just want to see me naked.”

“I won’t pretend that’s not a factor.”

Jessie laughed and tugged at Harry’s own shirt.

“Tit for tat.”

“Fair.” he winked. 

They made quick work of each other's clothes, and Jessie pressed a soft hand to Harry’s hardening cock. 

“So strange to see it so out in the open.” She muttered.

“What do you mean, how do you-?”

He never got a chance to finish the sentence as Jessie wobbled in place before falling back on the bed. Her breasts bounced with the movement, and her legs fused back as her feet transformed into that translucent fin. She was a mermaid once more. 

“The extra hormones from being turned on must have messed with the nannies.” Jessie pouted. “Oh well, we can still have some fun. If you don’t mind your dream girl with a fin.”

“Not at all.”

Jessie laid back, she couldn't help but run her hands over her body, caressing her scales and feeling the warmth of her skin. Jessie was no virgin, but she’d never had sex in female form before. Or with a human. The thrill of knowing this was the first time a human and merfolk would fuck made her soaking wet. 

Harry stood over the bed, chest heaving and with a hungry look in his eyes. Jessie gave him a teasing smile and draped her tail over the edge of the bed.

“Come on, don't make me wait any longer.” She grinned, reaching out a hand and pulling Harry down onto the bed with her. 

Instantly, they were kissing again. Their tongues danced, exploring each other with a hunger that had been building all afternoon. Harry's hand travelled up her tail all the way up to her hip, his fingers gently caressing the soft skin where her tail met her torso. Jessie shuddered as his fingers pressed against her sensitive scales, still tingling from the transformation. 

“What should I do?” Harry asked, half excited, half nervous. 

"Everything," Jessie whispered, her voice thick with desire. "Touch me everywhere. Just don’t stop."

Harry's hands roamed freely, his fingertips leaving trails of fire on her skin. He cupped her breasts, thumbs brushing over her nipples, causing her to shiver with pleasure. Being female was wonderful, it was like her whole body could feel pleasure. The idea of ever going back to having a male chest now made her recoil. Not when the soft, supple skin of her breasts could feel so lovely at the softest touch. Her tail twitched in delight at each touch, and Harry chuckled. 

“I hope that’s a good sign?”

“Oh yes!”

Her own hands began to roam over Harry’s chest, then down to his hips. The bones there felt different to the mermaids she’d touched in the past. She couldn’t help but squeeze those muscular thighs, taking in the slightly rough hair that grew there and, of course, the hard cock pressing against her tail. 

Her scales reacted, the ones that covered his pussy retracted, revealing the pink warmth, and Harry gasped.

“So that’s how you…”

“Yes, now, hurry up and fuck me, Harry. I have been waiting long enough.”

Without any further hesitation, Harry positioned himself, straddling her tail. He leaned over, pinning her arms above her head and finally wiping that cocky smile off her face. Her lips parted, a soft ‘oh’ of pleasure escaping as his tip pressed at the entrance. Slowly, he pushed inside, his cock sliding into her tight, slick channel. Jessie gasped, her body welcoming him, her tail undulating as she tried to force him in further. 

"Oh, gods, Harry," she cried out, her voice a mixture of surprise and pleasure. "You feel so good inside me!”

She hadn’t been prepared for just how overwhelming it would be. This was unlike any pleasure she’d felt as a male. For a moment, they stayed that way, him fully sheathed inside her before they couldn’t stand it anymore. 

Harry began to move, his hips thrusting in a steady rhythm. Jessie's body responded, her tail undulating with each stroke, her hands gripping the sheets as waves of pleasure washed over her. The bed creaked, and Harry chuckled breathlessly. 

“It’s like losing my virginity, the creaky bed, the feeling of a first time.”

“I know what you mean.” Jessie moaned, “Oh, just there…”

Harry's thrusts became more urgent, his cock plunging deep within her, hitting all the right spots. The muscles in Jessie’s tail tightened, her body bucking against his, seeking even more pleasure. Their words and banter turned to moans and gasps of ecstasy as they got closer to the edge. One of Harry’s hands let go of Jessie’s wrist and came down to stroke at her hip, scratching the scales and making her shiver. Jessie's climax built, her body coiling like a spring, ready to release.

"I'm close," Harry panted,  "So close. I want to feel you come with me."

"Yes, Harry! Oh, yes! I'm there with you. Don't stop!"

With one final, powerful thrust, Harry drove himself deep, his cock pulsing as he spilled his seed within her. Jessie's body convulsed around him, her tail flailing as she cried out in ecstasy. They clung to each other, their hearts racing as the waves of pleasure washed over them, leaving them breathless. For a moment, they were both tense, then the post-coital bliss washed over them, and they relaxed, flopping into the bed as satisfaction set in. Gently, Harry pulled out and fell onto the bed beside Jessie to watch her chest rise and fall as she caught her breath.

“We should probably get cleaned up.” Jessie giggled after a minute. 

“Should we have used protection? I got so caught up I didn’t even think.”

“I don’t think we need to worry about that, what with us being different species and all.” Jessie giggled. “But I do want to clean myself off before this cum gets stuck to my scales.”

Harry screwed up his nose and laughed.

“Charming.”

With some difficulty, Harry carried her into the bathtub. She looked almost comical with her tail hanging over the edge, but she didn't seem to mind. She was still utterly gorgeous. Harry sat by the tub, lovingly running his hands over the scales, washing them clean with wonder as what happened truly sunk in. 

“Do you think I could come to Atlantis someday?” He asked after a moment.

“Definitely.” Jessie grinned. “Once we figure out how to make the changes last through being horny.”

~

Epilogue

2010

The metal door groaned as the underwater elevator came to a stop. Harry flicked his new tail in excitement, taking in the red scales with a smile. He’d made this trip plenty of times now, but the rest of the ambassadors were a little more apprehensive. It had only been three years since the Merfolk had gone public with the rest of the world; this was to be the first ‘official’ trip for several important dignitaries to Atlantis itself. Harry and a handful of others who had been selected for first contact five years ago had been acting as their guides. Water began to flood the room, and several of the ambassadors began to look panicked, but Harry kept his cool.

“Relax, you all have gills now. I’d recommend holding your breath while the water covers them so you can adjust.” 

They did as he said and closed their eyes. Harry kept his open; he always enjoyed the strange view that came from behind half submerged for a moment. When the room was totally filled and depressurised, the door swung open, revealing a busty blonde mermaid with a ring of pearls hanging off her arm, one for each of them. 

“Welcome to Atlantis!” She smiled. 

Instantly, Harry was hit with a wave of warmth and relaxation, a siren. She wasn't projecting too hard, just enough to put everybody at ease; probably a good move because the other ambassadors instantly relaxed as they left the chamber one by one. 

They all looked around the great chamber with awe; even after half a dozen visits, Harry couldn’t help but be taken aback as well. Atlantis was truly a beautiful city. The buildings were made of smooth stone and coral shelves, all carved into towering spires. Schools of silver fish swam between the buildings, and of course, there was no need for stairs at any point, so rooms simply had doors in the walls and ceilings for easy movement. 

“If you will follow me.” Harry smiled. “The chamber opens up into Atlantis University, the learning hub for the city. We will start with a quick tour of the surrounding areas, and then I shall take you to see the mayor and her aides.”

As they swam, Harry waved to the pods of students they passed, as they left the campus grounds, they passed other Merfolk, all of whom were eager to meet yet more turned humans. 

“There really are far more women than men.” One of the male dignitaries said in wonder. Harry chuckled as he watched the man’s gaze move to the busty redhead who was swimming past.

“Careful, sir.” Harry warned, “That ring of pearls on her tail means she already has a committed pod.”

As if on cue, a pretty brunette mermaid swam by and wrapped her arms around the redhead, kissing her deeply.

“A l-lesbian?” The ambassador scoffed in shock. “My, I didn't realise Merfolk were so…liberal.”

Harry shook his head; some people were so closed-minded. 

“Yes and no, sir. Look.”

A male approached the pair, and they both gave him a teasing smile before taking a hand and swimming off together. 

“Pods are usually one male and two to three females.” Harry explained, “Those three obviously like to share amongst themselves.”

The older man’s cheeks coloured, and Harry could instantly tell where his mind was going. 

“And that’s…common?”

“Very common, as I said in my speech on the way down here. Merfolk are a very loving people.”

“You can say that again, bro.”

The familiar pet name made Harry smile wider, and he turned to see a welcome sight: Jessie, in all her glory, with her two former exes, Wendra and Pearl, at her side. The three of them rushed forward in a surge of silver bubbles to embrace him before bursting into giggles at the shock on the ambassador’s face. 

“Oh babe, didn't you tell them you’re married to a mermaid?” Jessie teased.

“Three mermaids, thank you.” Wendra corrected primly. 

“Th-three? You have three wives!?”
 The other former humans were gathering around now, and Harry waved them off, trying to remain nonchalant though deep down, he couldn’t help but puff up a little in pride.

“Of course, Jessie here was the one who made first contact with me, and when I first came to Atlantis and met her exes, well, we all hit it off right away.”

“And Jessie is worth putting up with if we get to have Harry.” Pearl cooed, sticking her tongue out playfully at Jesie before getting swatted.

“So mean, I thought we made up.” Jessie teased back. 

Harry gave them each a kiss in turn before turning back to the other ambassadors.

“It’s my job to improve relations between humans and Merfolk.” He explained. “It’s only logical that I integrate myself into their culture, with all the benefits that entails.”

“...Was that a mermaid pun?” Jessie snorted.

“Maybe.” 

He gave her another kiss on the cheek. 

“Better get back to work now, darling. I’ll see you all later.”

“You’d better, we missed you! It’s been forever since you were home.” Wendra pouted.

She was the clingiest of his wives, it was quite adorable. Every time they came to visit the surface, she was the one who had to be pried away. He loved all three of his wives, but Harry had to admit that his connection with Jessie was special. He’d been shocked when she’d announced her plans to stay female after that first time together. The sex had just been that good, apparently, and it wasn’t long before she was coming to visit every day so they could make love. And it was making love after a while. Not just sex. 

She still had that perfect body and Harry grinned, looking her up and down one last time before giving her a wink and heading off towards the mayor's office. It was going to be a long day of meetings, introductions and negotiations. He was sure to need a bit of stress relief when he finally got home and considering how long it had been since his last visit he was sure all three of his wives would be ready and willing.