Best-Laid Plans [Kacchan's Birthday 2020] - NSFW!

For Izuku's twentieth birthday, Katsuki had spent the entire day in the kitchen, cooking up the world's most amazing katsudon and a beautiful sponge cake covered in Deku-green icing. The genius had even gone so far as to make little chocolate decorations, piped out in the shape of Izuku's mask, stuck in the top of the cake along with his twenty green candles. He'd gone all out for his boyfriend's special day, had made it the most perfect birthday that he'd ever had.

Meanwhile, Izuku had... A history, he'd say. A ridiculous and terrible habit of disaster, Katsuki was more likely to call it. Somehow, he always ended up sick or injured on Katsuki's birthdays, and even when he didn't, he managed to mess up his gift or just say something stupid and ruin it all.

Katsuki repeatedly told him that nothing was ruined and it was just inconvenient but Izuku knew it just came out of pity – after all, Kacchan's plans always worked out so perfectly, and Izuku was a walking nightmare.

For Katsuki's twenty-first, though, Izuku had it all nailed down. He'd secured his present a week in advance to keep it safe, had ordered a cake from the best bakery in town and picked it up the night prior, he even took the day off work to make sure he didn't get beaten up or something in the hours leading up to dinner.

Katsuki was still working, of course. Taking the day off for your birthday was one of the things he sneered about the most. It was just a birthday, after all. Another circuit around the sun, woop-de-doo.

Regardless of what he said, Izuku was going to make it special.

When Katsuki got home, he found his boyfriend in a puddle of tears, sobbing into his knees with a blackened saucepan in hand. For a moment he just stared, lost and confused, before he came to his senses and sat down on the carpet at his side. He reached out, awkwardly wrapping an arm around Izuku's waist and pulling him in close.

“I'm home,” he said quietly. “Uh, are you okay?”

“I did it again!” Izuku sobbed relentlessly. “I just wanted to make curry I don't know how I screwed it up so bad!”

“Well, uh, you do tend to do that in the kitchen. Um, that's why you have me, right?”

“It's your birthday, Kacchan, you're not meant to be comforting me!”

Katsuki cracked a smile at that, gently taking away the pan and pulling Izuku into his lap.

“I'll stop when you cut it out with the waterworks, drama queen. So you burned a curry, so what? I''ll still eat it.”

“I burned two curries and wrecked three pots!”

Katsuki couldn't help but snicker at that, burying his face in Izuku's neck to muffle it.

“Let's make curry together,” he suggested. “Then I get a nice spicy dinner, and I get to spend time with my boyfriend. Deal?”

“You're not supposed to cook on your birthday!”

“But I like cooking, Deku. I appreciate the thought, but really, I don't mind cooking. Cooking with you sounds like a good way to unwind from work.”

“Okay,” Izuku sniffed, wiping his eyes on his sleeve. “I'm sorry Kacchan, I just wanted it to be special, like mine always are.”

“I don't need anything fancy for it to be special,” Katsuki shrugged, planting a tiny kiss on Izuku's jaw before he climbed to his feet. “Just don't tell the asshole squad that I was sappy, got it?”

“Got it!” Izuku agreed, managing a little smile when Katsuki reached out a hand. “Happy birthday, Kacchan.”

Their hands locked together, and Katsuki hauled him to his feet, just hard enough to make him stumble a little and land in Katsuki's waiting arms. For a top-ten hero he really had zero coordination, and Katsuki wasn't sure when he'd started to find that endearing of all things.

“Thanks, nerd,” he answered finally. “No surprise parties this time?”

“Nope! I learned my lesson in high school!”

“No idiots gonna show up for dinner?”

“Nope!”

“Parents included?”

“Nuh-uh! Your Dad said they'll call later, and meet up with you on the weekend. You're all mine, tonight!”

“You gonna propose or some shit?”

“Kacchan! No!” Izuku blushed. “For your birthday? That's such a cop out! When I propose it's gonna be special and exciting, not over a bowl of burnt curry!”

“When you propose, huh?” Katsuki teased, holding on a little tighter when Izuku squirmed in embarrassment. “Good to know.”

“W-Why?” Izuku mumbled. “Were you h-hoping?”

“Haah? No, idiot, I was teasing. Come on, let's go make curry. You chop, i'll do the bits that involve fire.”

“Deal.”

They'd been sharing the same apartment since they graduated high school, without even a real discussion behind it. It had just been kind of... accepted, that they would live together, especially when they both wanted to move into central Tokyo for better proximity to the action. It was a little further from their parents, which Izuku felt guilty about still, but having Katsuki at his side had instantly made it feel like home.

As Izuku pulled the pretty cake from the fridge, flavoured with dark chocolate and orange, Katsuki's hands came to rest over his like it was second nature – he supposed it was, by now. They'd come a long way since the fights of their middle school years, and now it was easy to share little touches without having to second guess themselves.

“Don't want you to drop my cake,” Katsuki teased, as he helped move it safely to the kitchen counter. “It looks really good.”

The chocolate-glazed top was ringed with orange roses, a big X of twenty-one candles marked out in the middle. Izuku had been ridiculously picky about the details, but the baker had delivered more than he had even imagined, and Izuku couldn't be happier with his purchase. Seeing Katsuki smile at it, smile at him, made his disaster of a day so much brighter.

“Can I have some too?” Izuku asked, as he lit the candles carefully. “Or are you gonna eat it all yourself?”

“Tempting,” Katsuki smirked. “I suppose I can let you have a slice.”

“Thank you, Kacchan! You're the best!”

“Damn right I am.”

To the surprise of both of them, Katsuki waited patiently for Izuku to finish his off-key rendition of Happy Birthday, letting him complete his affront on music before he leaned in to blow out the candles. Izuku cheered, and Katsuki wrapped an arm around his neck fondly, dragging him in for another quick burst of affection.

“I love you,” Izuku said softly, staring up at Katsuki like he was made of gold. “You're the best boyfriend in the world.”

“I'm the best everything in the world,” Katsuki smirked back, nipping at the tip of Izuku's nose. “You should know that by now.”

“I do!” Izuku laughed, handing over a knife for Katsuki to start cutting. “The best, Kacchan!”

“I love you too, nerd.”

When their bowls were full, and the rest of the cake was safely back in the fridge, they fell together into a heap on the sofa. Katsuki had worked long and hard, and the relief of just lying back on the soft cushions with his favourite person – not that he'd say that out loud – on top of him was the best feeling in the world. Coupled with his belly full of spicy curry, the tasty cake in his hand that he so rarely indulged in, and the peace and quiet of his friends and family leaving him the fuck alone, he wasn't sure it could get any better.

“I'm sorry I over-reacted,” Izuku sighed, snuggling comfortably into his boyfriend's broad chest. “I just tried so hard to make it perfect and special, I wanted you to be happy!”

“You could've just blown me.”

“I can do that!”

“I was kidding, you dork! I appreciate the effort, you know I do. And it is special.”

“I'm glad. I just wanted it to be nice and relaxing, we can celebrate with everyone else on the weekend or something.”

“Do we have to?”

“We should.”

“But do we have to?”

“You'll have fun,” Izuku giggled, amused by the little smirk on Katsuki's lips, the shine of mischief in his eyes. “It's just drinks, they promised nothing big and ridiculous!”

“I'm holding you to that.”

“Don't worry, I think they've learned their lesson, too.”

They fell silent for a minute, content to just cuddle and finish their cake, but when the bowls were down, scarred fingers twitched beneath the hem of Katsuki's shirt.

“I'll still blow you, though.”

“Fuck yeah.”

Izuku rolled over, shuffling down the cushions to position himself, and Katsuki just sat back and watched with rapt attention as Izuku unzipped him. He was already slightly hard by the time Izuku even pulled his pants down, and Izuku swallowed hard when he saw the bulge in Katsuki's boxers.

“Think you can take it all?” Katsuki teased, as Izuku tossed the dark pants aside and returned for his underwear. “Your pretty little mouth can handle it?”

“I'll try my best.”

He glanced up at Katsuki, eyes shining, before he caught the boxers between his teeth. Katsuki hissed when his dick sprung free, watching Izuku smile around his mouthful, dragging the cotton down over his thighs.

“Kacchan is so handsome,” he marvelled, when he'd cast them off with the pants. “I'm so lucky.”

“Shut up, nerd,” Katsuki blushed. “I don't need that shit.”

“That doesn't mean you don't like it, though,” Izuku teased, pushing his luck a little since Katsuki seemed to be in such a good mood. “Kacchan is so amazing, you deserve to hear it!”

“Sappy dumbass.”

“I love you too,” Izuku grinned, moving in so close that Katsuki could feel his breath on his cock. “I bet Kacchan tastes amazing, too.”

“Find out,” Katsuki grunted, reaching out to nudge Izuku's head down. “Use your mouth for something better than the yapping.”

“Okay, Birthday Boy. Just for you.”

His tongue darted out, toying at the tip, his wide eyes watching eagerly as Katsuki squirmed. Katsuki's head fell back, his chest heaving as the touch sent a shock up his spine, and he could feel the grin aimed at him even without looking.

“Gonna make my gorgeous Birthday Boy so happy,” Izuku hummed, taking little licks at Katsuki's shaft along the way. “Sound so good when you make those sounds for me.”

The most stubborn part of Katsuki's brain wanted to clamp his mouth shut at that, but when Izuku's lips wrapped around the head of his dick, those thoughts were lost to the wind. Any words he might have choked out dissolved into a long moan, and Izuku's lips shifted a little around him, a sure sign of another smile tugging at them.

When Izuku moaned around him, Katsuki felt like he was going to lose control in an instant, fingers reaching to clutch at green curls. Despite the way he grabbed a little too roughly, pulling at the strands a little harder than necessary, Izuku never missed a beat. In fact, he just hummed long and low, sending another cascade of vibrations through Katsuki's groin as he sank in deeper.

“God, fucking- Deku jesus christ you want me to cum already?”

Izuku popped off with a little slurp, tongue swirling around the slit on the way out.

“If Kacchan wants to cum, he should cum!” Izuku said brightly, making Katsuki burn bright red. “We can always wait a little for round two! Birthday Blowjobs are supposed to make you cum!”

“Round two, huh?”

“Of as many as you can handle,” Izuku laughed. “Can I keep going now, Kacchan? Birthday Boy needs to cum down my throat!”

“Fuck,” Katsuki hissed, nodding as he tugged the head back down. “Fuck yeah he does.”

Holding back his giggles, Izuku opened his mouth again, sinking straight down to the base and watching Katsuki gasp for air. Watching his boyfriend come undone was so addictive, he could do this all day and still be happy to watch it happen.

“So hot,” Katsuki choked out. “More, Deku.”

He tugged a little, testing, and sure enough Izuku moved with his hand, letting Katsuki set his pace. He'd learned long ago how to relax and take it all in, how to let Katsuki use him just right – it felt surprisingly good, thought Katsuki was still incredulous when he said that.

He shifted his hips a little, reaching one hand down to free himself from his tight underwear, and Katsuki laughed breathlessly as he watched.

“Feel good being my little toy?” he sneered. “Damn right it does. So damn lucky, aren't you? Getting to suck the best cock in the world?”

Izuku moaned his agreement, drooling around Katsuki's shaft, and when he swallowed hard, he felt it all come together. A short burst of cum hit the back of his throat, and he swallowed again, forcing it down before he could start to gag. Another spurt, a little smaller, and then a trickle that continued as Katsuki's pace dropped off, Izuku taking control again as he finished sucking it all out.

When he slid off again, the softened cock falling from his lips, Katsuki's grip shifted to grab feebly at his bicep. Izuku smiled when the hand dragged him up, pulled him to his chest, nestled together like they were made for each other.

“Happy Birthday,” Izuku giggled, nuzzling into Katsuki's neck. “Can we move to the bed before round two?”

“Gimme a minute.”

Izuku nodded, snuggling in comfortably – his own erection could wait, he didn't mind cuddling a bit first. He never minded cuddling, honestly. Happy, sad, angry, horny, it was all the same when Katsuki's arms opened to him.

“Sorry your plans didn't all work out,” Katsuki mumbled into Izuku's messy hair. “It's been great, though.”

“It's okay,” Izuku grinned. “I just wanted to make you happy! And besides, most of them worked out.”

“Yeah?”

“We're here, together, undisturbed, on your birthday, after a yummy dinner and a gorgeous cake.”

“Plus the birthday blowjob.”

“Plural,” Izuku grinned. “Blowjobs.”

“You're gonna do it again?”

“Damn right I am.”

Katsuki snorted, but nodded all the same, ruffling Izuku's curls with his hand.

“Well I ain't gonna say no.”

Izuku sat up, resting on his knees, and when Katsuki looked up with a contented little smile on his face, his grin stretched impossibly wider.

“Bedtime, Kacchan. Birthday Boy worked hard today, needs an early night!”

“Yeah, he does.”

Izuku climbed off the couch, ditching his pants rather than pull them back over his dick, then pausing to strip his shirt off too. He jumped when Katsuki whistled, cheeks burning under the fiery gaze.

“Lookin' good, nerd,” Katsuki teased. “This cute little bod' is just for me?”

“Always for Kacchan,” Izuku agreed, flexing a little and hoping Katsuki wouldn't notice it was intentional. “Wanna come play with me, Birthday Boy?”

“Hell yeah.”

Izuku offered his hand, a hint of nerves flickering through his mind like always, but Katsuki locked their hands together without a moment of hesitation. He let himself be pulled to his feet, let Izuku reach under his shirt and peel it off, and let their lips come together in a hot, messy embrace.

“Round two?” Izuku asked, fingertips trailing over Katsuki's rapidly hardening cock.

“Round two.”