The Number One Hero [NSFW]

Happy Birthday Zel!!! You're the best wife a person could ask for, I hope you have an amazing day <3 Also sorry about typos etc, I was too tired for final edit before posting ^^; I'll proofread it later!

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Izuku could feel himself trembling, but he couldn’t seem to make it stop.

He’d spent an hour getting dressed – or, maybe being dressed was a better word for it? No one ever trusted him for big, fancy events. Every award ceremony, every gala, every presentation or store opening or honestly anything other than his general hero work, he always ended up with someone at his door, shoving an outfit into his arms before he could come up with a word of protest. He supposed he appreciated the effort, but honestly, he didn’t see why it mattered so much which suit he wore.

Then again, maybe that was why they wouldn’t let him dress himself.

So he’d suffered through an hour of being poked and prodded, this time by his boyfriend which was simultaneously so much better than it being his friends and also so much worse. Damn perfectionist boyfriend. But finally he’d found himself standing behind heavy velvet curtains, listening to various awards being given out as they worked their way toward the one everyone cared about the most: Number One Hero.

They’d given up trying to get every hero in the room for the announcements, they were spread too wide across the country and too busy with so many important things, but they always made sure to have the new Number One on deck. Izuku had hoped that maybe, just maybe, it was finally his year. He’d gotten other awards already, though – most civilians saved being the most notable one, he was pretty proud of that. But at least if he’d been standing around all night without hearing his name, he would know there was another award coming for him, one that he was specifically asked to be there for.  

A warm hand slipped into his, and Izuku felt himself steady in an instant. He glanced over to see the familiar red eyes looking down at him, holding tight to his hand like it was second nature to him – then again, it kind of was after being together so long.

“Who the hell would they rank above you?” Katsuki asked knowingly. “Not like anyone else comes close.”

“You would say that anyway,” Izuku pouted. “You always say that.”

“Yeah, because they’re always idiots,” Katsuki snorted. “It’s not gonna be me because the idiots think saying fuck is worth losing points over, and the only other hero who even remotely deserves it is your nerdy ass.”

“Kacchan’s faith in me is better than any ranking,” Izuku grinned.

“Shut up, asshole, no it isn’t.”

Izuku squeezed tighter when Katsuki’s name was read out at number three, flashing a big smile his way as a short montage of his best fights popped up on the screen. They’d muted the footage, thankfully, but the sight of Katsuki flying through the skies, hurling insults and explosions alike at villains, always made Izuku inexplicably happy, even without the sound to accompany it.

He barely even heard the words when they announced number two, his mind going blank with the realisation that it wasn’t him, and even with Katsuki’s fingers laced through his, he still started to shake again.

“I told you so,” Katsuki grinned, such a genuine smile that lacked any bit of malice or condescension – those smiles were so rare that Izuku almost didn’t want to go, didn’t want to step out on stage and lose it. “Well done, nerd.”

“I love you.”

Izuku wasn’t sure how the words had slipped out, only registered that they had and that he was such an idiot, but the audience was applauding, cheering and screaming his name, and Izuku could only pull his hand away, blushing and stammering as he hurried out onto the stage. He was grateful that everyone was used to seeing him turn into a blushing, stumbling idiot when he wasn’t fighting, since he knew there was no way he could possibly compose himself in that moment. He’d just told Katsuki he loved him – and sure, they’d been together for like a year but it was still Katsuki.  

“Thank you so much!” he squeaked, clutching the little plaque to his chest. “I, um, I’ve spent my whole life dreaming of this moment, hoping maybe that enough hard work would get me here one day, so I’m so happy to be here and to share this moment with all of you! Thank you!”

He bowed multiple times as the audience applauded again, then finally stumbled his way off the other side of the stage, heart pounding harder than ever and his lungs barely holding air. Immediately he was mobbed by other heroes, everyone from the young new sidekicks who just wanted to congratulate him then run away blushing, to the seasoned pros he’d finally beaten out, who laughed and told him they could finally retire and leave it in his hands. Not to mention his friends who just seemed to squeal and hug and bounce up and down a lot. He found himself swept away without seeing those red eyes again, leaving him somewhere in their excited wake, and he wasn’t entirely sure if he was grateful for that or not.

The after-party was really the big event of the day, anyway. The formal stuff with stages and awards and tidy suits got pushed aside, everyone stripping off their jackets and ties, rolling up their sleeves for a few drinks and some dancing in a local bar that had been booked out just for the heroes. His eyes quickly found the ones he thought he’d avoided, reluctantly meeting Katsuki’s gaze across the room, and before he could come up with an excuse to leave, the familiar face was right in front of him.

“I’m sorry,” he whispered quickly. “It just slipped out, I don’t know what I was thinking!”

“I love you too,” Katsuki said firmly, not even bothering to lower his voice.  

“You do?”

“Haah? Of course I do, dumbass! And I have a surprise for you at home, so let’s get out of here.”

“I can’t!” Izuku whined, all his fears gone in an instant when Katsuki snatched his hand. “I have to thank everyone and make a speech and everything. Hawks wanted to have a drink with me, I cant say no to Hawks, Kacchan!”

“Fine,” Katsuki huffed. “I guess I’m staying too, then.”

“Really? You’ll stay with me?”

“Should probably celebrate my idiot boyfriend for once.”

Izuku flung his arms around Katsuki’s waist, squeezing him tight, and when he looked up he found a surprisingly fond look on Katsuki’s face, a tiny little smile tugging at his lips as he wrapped his arms around Izuku in return.

“You did good, nerd.”

“Thanks, Kacchan.”

Katsuki’s protective embrace seemed to get Izuku a moment of peace, away from the excited crowd around him, and as much as he loved the enthusiasm, he was grateful for that little break.

“So what’s my surprise?” he asked, resting his cheek on Katsuki’s shoulder.

“Not telling, it’s a surprise.”

“That’s mean!”

“You’ll survive.”

“Just tell me!”

“Nope, not happening.”

They split apart when a new wave of congratulators arrived, sharing awkward and reluctant smiles, but still Katsuki remained at his side, watching him chat with the up-and-coming heroes. Izuku had expected him to wander off and find Eijirou or Mina or something, but he just waited patiently, a word Izuku knew he’d be laughed at if he described Katsuki with it to anyone else.

When the crowd thinned out, people finding seats to catch up and snack on some bar food, Katsuki plucked two glasses of champagne from the bar and shoved one in Izuku’s hand. He prepared himself for some cheesy comment, steeling himself to hold back the tears, but when Katsuki raised his glass too the room, his jaw dropped.

“Oi, listen up, extras!” he yelled, the room quickly settling down to hushed whispers as they all turned to look “Let’s make a damn toast, to our big nerd Deku, yeah?”

“You’re so romantic,” Izuku giggled. “Kacchan, please.”

“He makes us all work harder and be better,” Katsuki continued, refusing to meet Izuku’s eyes. “He deserves this plaque more than anyone else ever has. So cheers to Deku, who always said he’d be number one, and somehow actually managed to pull it out of his ass”

The room filled with cries of “cheers!” and the clinking of glasses, the buzz of conversations quickly starting back up, but Izuku could only stare at the slightly-pink face as it drank champagne, taking a clearly-deliberate age to get through the tiny glass.

“Kacchan is so cute,” he fawned, when he managed to unearth his voice. “Thank you!”

Katsuki spluttered, almost spitting his wine back up, and Izuku relished the flush that grew brighter in his cheeks.

“Can we leave now?” Katsuki grumbled, looking away with a little pout.

“Give me ten minutes,” Izuku giggled. “As soon as I’m done with my speech, okay?”

“Deal.”

─────

Izuku fumbled at the apartment door, stuffing his key into the lock with a lot less coordination than he’d have liked, but finally he managed to turn the handle and make his way inside. He froze before he’d even gotten his shoes off, though, when Katsuki flipped the light switch and lit up a room full of green balloons and streamers, a massive banner hanging in their living room.

“Congratulations, Number One,” he read aloud, already sobbing. “Kacchan!”

“I knew it’d be you, even if you didn’t.”

He pulled Izuku into his arms, and Izuku curled into his touch, clinging to his fancy shirt with clumsy fingers and drenching it with his ridiculous tears. It was truly lucky that Katsuki had known him so long, anyone else would have been concerned about the crying, but Katsuki just held him close, rubbing his back knowingly.

“Kacchan is amazing,” he whispered. “I couldn’t have done it without you.”

“You might have gotten there easier without me,” Katsuki snorted.  

“Mm… I guess there would have been less people to beat, but you always inspired me to work harder!”

“That’s… Not what I meant.”

“I refuse to believe you meant anything else,” Izuku sniffed, turning his head to nip at Katsuki’s neck lightly. “We’re past all the other nonsense.”

“Did you just bite me? Asshole.”

Izuku bit him again, slightly harder this time just to be a jerk, smirking when Katsuki trieed and failed to glare down at him.

“That’s it,” Katsuki huffed. “You’re coming with me.”

He hitched Izuku up and flung him over one shoulder, carting him to the bedroom like a pile of laundry instead of the flailing, giggling hero that he was. Izuku fought weakly, thumping his fists on Katsuki’s back, but Katsuki didn’t even seem to notice.  

“There,” he grinned, throwing Izuku onto the mattress and enjoying his indignant little squawk. “Back where you belong.”

“Kacchan!”

His complaint was completely ruined by the dopey smile on his lips, his champagne toasts and cocktail with Hawks making him just tipsy enough to forget how to hide his feelings. He didn’t seem to notice, though, still looking up at Katsuki as if he were pouting, and Katsuki hated the way his heart swelled when he stared down at the flushed, freckled, and inexplicably happy face.

“So you’ve been keeping your feelings a secret again, huh?” Katsuki teased, working his way down the buttons on Izuku’s shirt, unfastening them slowly, one by one. “We’ve talked about this, Deku.”

“I wasn’t!” Izuku insisted, tangling his hands in Katsuki’s hair and dragging him down close enough to kiss. “I just… Never said it.”

“Terrible excuse,” Katsuki tutted. “Gonna have to teach you a lesson for keeping secrets.”

Izuku whined, face burning impossibly brighter when he heard it come out, but Katsuki only smirked.  

“You did get a few nice awards tonight, though,” Katsuki mused, tossing Izuku’s shirt aside and leaning down to lick a perky nipple. “So I’ll have to teach you a lesson, and reward you for doing a good job.”

“Please, Kacchan.”

Katsuki tugged the dark pants down over Izuku’s hips, pausing to plant a kiss on his tented boxers before he grabbed them too, moving to ditch them over the side of the bed. Izuku reached pitifully for Katsuki’s shirt, fumbling at the buttons with zero coordination, and Katsuki chuckled at him as he pushed the hands back down.  

“Let me do the work tonight, Deku.”

“But I like helping!”

“Exactly.”

The pout worked this time, Izuku looking up at him like a pitiful little puppy, and for a moment Katsuki felt guilty. The moment he unfastened a button, though, the expression was gone – his pout immediately forgotten in favour of watching eagerly for Katsuki’s clothes to come off.

Katsuki took his time, playing it up a little as he let his collar fall open on bare skin, flexing a little to make sure his pecs popped as he opened the next little bit. Izuku stared like it was the most riveting movie in the world, only moving to lick his lips when the last button opened and the two sides fell away, Katsuki’s carefully-tensed abs meeting his eyes finally.

He shed the shirt completely, letting it mix in a wrinkled pile with Izuku’s, though he couldn’t help but think how much he liked that. There was something so stupidly domestic about their clothes mixing together, and he hated himself for being the kind of sap who found that romantic.  

“Pants, Kacchan.”

“I’m working on it,” Katsuki assured him. “Patience, Deku.”

“Don’t wanna be patient,” Izuku protested. “I’m the number one hero, surely I get one pass on the patience?”

“Manipulative piece of shit,” Katsuki snorted, laughing all the same as he shed his pants obediently. “You can’t keep playing that card.”

“Bet I can.”

When Katsuki shed his boxers, Izuku’s breath hitched, his eyes catching the glint of something shiny. Katsuki shifted his hips knowingly, letting Izuku get another glimpse of silver, tilting his head in a weak attempt to look more closely.

“Thought maybe we’d find a chance backstage,” Katsuki smirked, turning around and finally giving Izuku a clear view of the plug that sat firmly in his ass. “Wanted to be ready.”

“Holy shit, Kacchan.”

“Careful, Deku, they’ll take away your ranking if they hear you say that.”

“Don’t care,” Izuku insisted, reaching for the plug and giving it a little prod. “You’ve had this in all night?”

“Uh-huh.”

“No wonder you wanted to get out of there so bad.”

“You gonna just lie here and look at it? Or are you gonna take it out and let me ride you?”

“Hell yes.”

“To which one?”

Thick fingers wrapped around the base, much steadier than they’d been when he was trying to unlock the door, and Katsuki let out a long, slow breath as Izuku slid it out of him. He didn’t bother to wait, grabbing a bottle of lube from the bedside table to slick Izuku up, and Izuku watched with wide eyes as Katsuki sank down onto his waiting cock.

“Fuck!” Izuku hissed. “You’re so tight.”

“Well, yeah,” Katsuki smirked. “I don’t have a plug big enough to match up with your dick.”

“I don’t need the flattery,” Izuku laughed weakly, almost pained. “I just need the fucking, Kacchan.”

“Am I just a hole to you?” he teased.

“A couple of holes and a dick, yeah,” Izuku fired right back. “The tongue is pretty good too, when you use it for better things than talking.”

“Someone is bossy tonight,” Katsuki snorted, leaning down all the same to give Izuku a quick kiss. “Is my hero feeling needy?”

“Fuuuuuck.”

“I’ll take that as a yes.”

He rose up on his knees, making a painfully slow drag up Izuku’s shaft, enjoying the way Izuku fell apart under his touch. Despite his words, Izuku made no move to speed him up; he just lay back with his fists clenched, moaning as Katsuki slowly tore him apart.

“So big,” Katsuki praised, ignoring how much of an idiot he felt like for it – he’d never been very good at the dirty talk. “Mmm, Deku, so strong.”

“So hot,” Izuku returned, through a groan he couldn’t seem to control in the slightest. “Feels so good, Kacchan. Been waiting all night.”

“You’re telling me,” Katsuki smirked. “I’ve been walking around stretched by that damn plug, thinking about how good it was gonna feel to have your dick in me instead. It’s better than I even imagined, Deku. You feel so good inside me.”

“Fuuuuck.”

Katsuki lifted his pace a little, taking mercy on his tortured boyfriend, and Izuku’s hands reached for him, fumbling uselessly. Katsuki conceded, linking their fingers together just how Izuku liked it, squeezing him nice and tight every time he sank down onto the thick cock. Izuku was crying again, eyes glazed over as the little drops spilled down his cheeks, and Katsuki leaned down to kiss them away.

“I love you, Deku,” he said softly. “You know I do.”

“I love you too, Kacchan.”

With a last quick thrust, Katsuki spilled up Izuku’s torso, frantically riding it out with shaky legs and feeling Izuku come undone, filling him up in stark contrast to the empty feeling in his own sagging dick. He made a few last strokes, making sure Izuku was done, then gently levered himself off to fall into Izuku’s arms.

“I’m the number one hero, Kacchan,” Izuku whispered. “I should get cuddles.”

“Dumb nerd,” Katsuki snorted. “You get those no matter what number you are, you know that.”

“But number one gets more cuddles, right?”

“Sure,” Katsuki snorted, nuzzling in to nibble on Izuku’s neck. “You tired, baby?”

“Super tired.”

“You don’t wanna go again, then?”

“Super wanna go again.”

Katsuki laughed outright at that, not stifled in the slightest, and Izuku cracked a smile of his own, eyelids fluttering open again. His wide eyes blinked at Katsuki a few times, taking it all in, until Katsuki leaned in and grabbed him in another kiss.

“Wanna fuck you this time,” Izuku murmured. “Properly.”

“Sure, nerd. Fuck me like you mean it.”

Despite his fatigue, when Katsuki rolled onto his stomach to present his perky little butt, Izuku didn’t hesitate. He slung a leg over Katsuki’s thighs, kneeling over him, and leaned in to kiss the smug smile that Katsuki directed at him over his shoulder.

“Can you even get it up yet?” Katsuki teased. “I know it takes you a while, old man.”

Izuku ground his hard cock against Katsuki’s ass pointedly, and Katsuki hummed his acknowledgement, resting his head on his folded arms and wiggling his hips a little. His position hid the blush that came with the movement, still so completely inexperienced at trying to act sexy, but by the way Izuku’s breath hitched he guessed the nerd had appreciated it.

“God you’re hot,” Izuku whispered, grabbing a handful of Katsuki’s butt cheek and just squeezing. “I’m so damn lucky.”

“You’re lucky? I’m about to get fucked by number one.”

“God I love you.”

“Love you too,” Katsuki assured him, surprising himself a little with how much the words made him smile. “Come on, Deku, show me what the number one hero cock is made of.”

He spread Katsuki’s cheeks apart with his hands, getting a clear view of the messy hole already waiting for him to return, and lined himself up with the opening. There was no resistance, no hesitation, he just sank straight in like the hole was made for him, and Katsuki arched his back a little when Izuku grazed over the important spot.

“Gonna make you feel so good,” he breathed.

“You don’t have to,” Katsuki smirked. “Use me, Deku. I’m just a little hole for number one to get off in.”

“Shit.”

Slightly nervous still, Izuku tangled his fingers in Katsuki’s hair, pulling him back to make his back bend further, his cute little butt popping up to match. Izuku pulled out until only the very tip of his dick remained inside, and with no warning, he thrust in hard. Katsuki moaned like he’d never heard before, grinding his hips back into Izuku’s touch, and with another muttered curse, Izuku did it again. And again.

Soon they had an unsteady rhythm, lacking the usual practiced coordination they shared, but finding some kind of heightened passion in return. Izuku’s fingernails raked down Katsuki’s back, leaving faint pink marks in their wake, and Katsuki only moaned louder in response, meeting Izuku’s thrusts with vigour.  

Katsuki was drooling by the time he came for a second time, cock pressed into the sheets and quickly putting him in a puddle, but Izuku didn’t let up. He was so close, they were so in sync, he just needed-

“Cum in me, Izuku,” Katsuki gasped. “My hero.”

Izuku saw white. He couldn’t even remember the last time he’d come so hard, let alone as a second orgasm so soon after the first – maybe it was true what they said about young men, after all. He’d have to make sure they got it all out before they were too old to handle it anymore.

“You mean it?” Izuku asked, gasping for air as he pulled out, wincing a little. “Kacchan?”

“Mm-hm,” Katsuki mumbled, cheeks flushed and eyes firmly closed. “I don’t say shit I don’t mean.”

“You’re my hero, too.”

“I know,” Katsuki smiled faintly. “You’ve made that pretty clear.”

Izuku gathered Katsuki into his arms, cradling him as he scooped him up, a stark contrast to the way Katsuki had thrown him around on their way into the bedroom. He got them both into the bathroom for a quick wipe-down with a towel, and then they were falling into the spare bedroom together, curling up in a bed that was virtually identical to their own – same mattress, same type of pillows, even the same blankets, other than a ridiculous All Might themed throw blanket that lay across the end of the bed “because it looked nice” – Katsuki had given up arguing with his boyfriend’s terrible taste.

“I love you, Kacchan,” Izuku whispered, as they curled into each other comfortably. “I’m happy I can say it now.”

“You can say whatever you want,” Katsuki assured him. “I don’t care what it is, just say it if you want to.”

“Anything?”

“That’s what I said, isn’t it?”

Izuku smiled to himself, making sure Katsuki’s arms were safely locked in before he opened his mouth again.

“You need more practice at the seduction. You were more like a fluffy kitten than a sexy tiger.”

“Shut the hell up,” Katsuki blushed, shoving his head into Izuku’s shoulder to hide it. “Last time I try to be sexy for you, asshole.”

“I appreciate the effort!”

“Bitch. Don’t think I’ve forgotten about you hiding your feelings from me, either.”

“Loooove youuuu.”

“Fuckin’ love you too, asshole. Against my better judgement.”

Izuku giggled as he curled around Katsuki’s body, wrapping him up tight and warm in his grip, and despite his embarrassment, Katsuki nuzzled into the hold. Post-sex was the cutest and cuddliest Izuku ever saw him, and it was his favourite part of their night – his favourite part of living together in general, if he was totally honest.

“I really do,” Izuku whispered. “So much.”

“Yeah,” Katsuki mumbled, pausing for a second. “Congratulations, Deku. You deserved it.”

“The award?”

“My love.”

“Idiot,” Izuku giggled, watching a tiny smile creep across Katsuki’s lips. “Goodnight, Kacchan. Thanks for staying with me tonight.”

“Any time, nerd.”