Archive of Our Own ^beta

Chapter Text

Izuku sat cross-legged on the bed, picking at a loose thread on Bakugou’s blanket. His foot occasionally bumped against the side of the bedframe as if he couldn't sit still. He should be thrilled, him and Kacchan have been together for 4 months now. Only the shift is different, of course that’s a given but it doesn’t feel right. He did love the soft kisses, and whispers of sweet nothings and the new level of closeness they’ve reached.

He would never admit this out loud but a small part of him misses the loud, overly obnoxious side he was used to. The way Kacchan would yell at him, and the look of controlled fury in his intense ruby eyes, how his muscles would tense and he could see the way his hands clenched into fists. Kacchan still teases him, they have playful banter but it’s not the same.  Was he a masochist? Probably.

“Kacchan?” He bit his lip, Kacchan raised an eyebrow looking over at him from his desk. He turned his chair around,

“Yes?” God even his voice is softer now. Izuku takes a deep breathe,

“Uhm, so… I have a request… it’s kind of stupid.” He fiddles with his fingers, unable to make eye contact.

“Well go on . Spit it out.” Kacchan sighs out looking like he’s bracing for the worst. Izuku can feel the heat creeping up,

“Well.. okay. I like how things are trust me. But maybe….” He trails off. Here goes nothing.

“I kinda want you to scream at me again, and act rudely. You know like back in first year.” Kacchan freezes.

There’s a beat of silence,

“You want me to be an asshole? Like on purpose? Why!?”

“I don’t know it’s kind of hot.”

Kacchan didn’t say anything after that. Just stared at him for a full ten seconds like Izuku had grown a second head.

Then he scoffed, muttered something like,

“You’re so fucking weird,” and spun back to his desk, shoulders stiff.

Izuku waited. Five minutes passed. Then ten. Kacchan didn’t say a word. No explosion, no yelling, not even a sarcastic jab. He just...ignored him.

Fine.

Two days later, Izuku found himself in the common room surrounded by the rest of Class 1-A. The usual chaos was happening Kaminari and Kirishima wrestling over the remote, Mina giggling into her phone, Uraraka curled up on the couch reading.

And then there was Kacchan, sprawled in the armchair who looked like he hated everyone.

Izuku narrowed his eyes.

If he wouldn't give him the chaos in private, he'd provoke it out in the open.

"Hey Kacchan," Izuku said loudly, flopping dramatically onto the couch across from him.

Kacchan didn’t look up from his phone.

"What?"

"You remember when you used to call me 'shitty nerd' like… all the time?" Izuku said, voice just a little too cheery.

Kacchan’s eyes flicked up. “No.”

“You’re such a liar," Izuku grinned. "You basically invented verbal harassment.”

A couple people glanced over. Kaminari snorted.

"Bro, what?"

Kacchan’s brows twitched.

"What the hell are you talking about?"

"I'm just saying, you’ve really softened. I mean, I haven't heard you threaten to blow me up in weeks. Kinda makes me think you’ve gone soft, y'know?" Izuku leaned forward, elbows on his knees, chin resting on his hands, eyes locked with Katsuki’s.

“Oh my god,” Mina whispered, sensing something was happening.

“Izuku,” Kacchan said slowly, sitting up, glaring now.

“Do not start with your freaky little kinks in front of everyone.”

Izuku’s cheeks flushed but he smiled wider.

“I’m just saying, I kind of miss you being mean. I think you’re losing your edge.”

That did it.

Kacchan shot to his feet so fast the chair scraped against the floor. “You think I’m losing my edge, Deku?” he snarled, stalking toward him. “You wantme to scream at you in front of the whole damn class? Would that get your weirdo rocks off, huh?!”

Kaminari dropped the remote. Someone audibly gasped.

Izuku bit back a grin. His heart was hammering in his chest but it wasn’t fear, it was satisfaction.

“There he is,” he whispered, just loud enough for Kacchan to hear.

Kacchan stared at him, jaw clenched so tight you could see the muscle twitching. His hands curled into fists at his sides, little pops of light sparking in his palms.

“You’re so lucky I’m dating you,” he growled.

“I know,” Izuku said sweetly.

Kacchan groaned, dragging a hand down his face.

“You’re the worst.”

“You yelled at me,” Izuku said, and this time, he couldn’t hide the delighted little smile breaking across his face.

Kacchan turned on his heel and stormed out of the room, muttering a very loud stream of curses.

Kaminari leaned over to Izuku with wide eyes.

“Bro… are you okay?”

Izuku just leaned back, crossing his arms behind his head, completely at ease.

“Never better.”

For the next two days, Kacchan  didn’t rise to a single one of Izuku’s taunts.
Not one.

Izuku called him soft.
He called him sweet.
He even, at one horrifying point, called him adorable in front of Kaminari.

Nothing.
Kacchan didn’t even twitch.

It was unsettling. It was suspicious.
It was… very much not good.

By the third day, Izuku was paranoid. He knew Bakugou too well, this was calm-before-the-storm energy, and Kacchan didn’t do calm.

He found out what “storm” meant that night.

The class had gathered for movie night in the common room. Lights dimmed, popcorn everywhere, everyone half-asleep. Izuku was curled up on the couch with a blanket, mindlessly scrolling on his phone when Kacchan dropped down beside him, way too close.

“Oh—uh, hey, Kacchan.”
He tried to play it cool. He failed. Miserably.

Bakugou didn’t look at him, just leaned back, one arm slung lazily over the back of the couch behind Izuku’s shoulders. His voice was low, almost casual:
“So… you like it when I yell, huh?”

Izuku blinked, suddenly very aware of how close their knees were touching.

“Uh—well, I mean, not all the time—”
“Shut up.”

The way he said it quiet, dangerous, like a promise sent a jolt down Izuku’s spine.

Bakugou leaned in, close enough that his breath brushed Izuku’s ear. “You think I’ve gone soft, Deku?”

Izuku swallowed hard.

“…Maybe just a little.”

Bakugou chuckled. A low, smug little sound that made Izuku’s stomach flip. “Cute.”

Izuku turned his head—big mistake. Kacchan was smirking, the kind of smirk that said you asked for this.

Then Bakugou raised his voice just enough for the room to hear:
“Hey, Deku. You still get all hot and bothered when I yell at you, or are you into something else now?”

Every single head in the room turned.

“WHAT?!” Izuku practically exploded, face crimson.
Iida immediately choked on his drink. Mina dropped her popcorn.
Todoroki quietly got up and left the room.

“Oh my god—Kacchan!” Izuku hissed, gripping the blanket like a lifeline.

Bakugou leaned back with a satisfied grin.

“What? You said it yourself, didn’t you? Don’t act shy now.”

“I—I didn’t mean for you to—”
“What, talk about your freaky shit in public? You did it first, nerd.”

Mina was thriving.

“Wait, this is, like, canon now? You two actually—”
“SHUT UP, PINKY!” Kacchan barked.
She shrieked and hid behind Kirishima, laughing the whole time.

Izuku covered his face with both hands, mortified.

“You’re evil.”
Bakugou grinned wider.

“Nah. Just getting even.”

And then, because he couldn’t resist twisting the knife, Bakugou added,
“Also you should see your face right now. You look like a tomato with anxiety.”

That finally got Izuku to laugh, muffled through his palms.

“You’re terrible.”
Bakugou shrugged.

“Maybe. But you love me anyway.”

“Unfortunately,” Izuku muttered.

Bakugou smirked, leaning back again, smug as ever.

“There’s the Deku I missed. All nerdy and flustered.”

With the major drama over everyone’s attention goes back to the movie, they thankfully let Izuku compose himself. Izuku blinked, still partially hiding behind his hands, heart hammering like a drum in his chest. Bakugou’s smug grin softened slightly, and he leaned in closer, so close Izuku could feel the warmth of his chest against his own.

“You know,” Kacchan murmured, low and teasing,

“you’re ridiculous.”

“Yeah, well… you like it,” Izuku shot back, voice shaking slightly, though a tiny grin tugged at his lips.

Kacchan smirked, his hand moving to tilt Izuku’s chin up gently.

“Damn right I do.”

And then, before Izuku could even process what was happening, Kacchan’s lips were on his, soft at first, testing, then pressing harder, possessively, as if making up for all the words left unsaid over the last few days. Izuku melted into him, arms wrapping around Bakugou’s shoulders, pulling him closer, kissing him back with all the pent-up adoration he’d been holding in.

Kacchan’s hands tangled in Izuku’s hair, thumbs brushing his cheekbones as he deepened the kiss, low growls rumbling in his chest. The chaos of earlier, teasing, taunting, embarrassment—all melted away under the heat of their connection.

When they finally pulled back for air, foreheads resting together, Izuku’s cheeks were flushed and his lips tingling.

“You—wow,” he breathed.

Kacchan’s lips curved into a soft smirk.

“What, Deku? Speechless now?”

“Not speechless… just… happy,” Izuku admitted, smiling up at him with pure affection. Kacchan’s eyes softened, the fiery intensity now laced with warmth.

“Good. Because you’re mine.”

Izuku’s heart skipped a beat. “Always.”

And just like that, Kacchan  leaned down again, peppering his face with quick, teasing kisses on his forehead, his nose, his cheeks until Izuku couldn’t stop laughing, trying to squirm away but utterly unable to resist.

“Stop!” Izuku giggled. “I can’t—”

“Can’t what?” Kacchan purred, leaning closer so their noses brushed.

“Handle me?”

Izuku’s laugh turned into a soft, breathless sigh as he leaned in for another kiss, softer this time, lingering, savoring the closeness, the heat, the undeniable love between them. Kacchan mirrored it perfectly, tilting his head, brushing his lips along Izuku’s with all the affection he could muster. When they finally parted, just slightly, Izuku nuzzled into him.

“Promise me,” Izuku murmured, “you’ll never stop… being you.”

Kacchan pressed a final kiss to his temple, smirking with that mix of arrogance and tenderness he always carried.

“Never. Only for you, nerd.”

And Izuku melted into him, knowing he was exactly where he was meant to be—safe, adored, and loved in all the messy, perfect ways only Kacchan could manage.

Chapter Text

Once finally in their own bubble of privacy Izuku falls back into the bed, with katsuki towering over him. He isn’t smiling anymore, his beautiful face twists into a frown.

“You’re such a needy brat. I can’t believe you Deku.” His voice is sharp, tight. Izuku bits his lip, his fingers tremble as they run up the broad shoulders. Not wanting to cave into him even more katsuki swats his hands away.

“Now Deku. We agreed I’ll give into your needs. As long as you don’t provoke me in front of people. But you just couldn’t help yourself could you?” With every word Izuku becomes more and more unraveled. He really couldn’t handle it, seeing the way katsuki lost it at Kaminari, it wasn’t fair why couldn’t he channel that energy into him.

“Well to be fair… you’re the one who started shouting at Kaminari… I got jealous.” His voice is small but firm, he reaches again and this time is allowed permission. Katsuki scoffs rolling his eyes,

“You’re such a freak. Now I’ll feel weird for getting mad at my friends.” That pulls out a giggle, but more and more clothes are discarded. And soon they’re skin to skin.

“You can always just scream at me. I can handle it.” Izuku pouts tracing patterns on Katsuki’s delicious abs.

“Anyways, I didn’t provoke you technically. You were already mad. I just added on to the conversation.” He moves his eyes back to Katsuki’s, who smirks a little.

“You’re not getting off on a technicality here you shitty nerd.” The nickname though pulls out a shiver.

In a blink, Katsuki’s strong hands are wrapped around Izuku’s wrists, pinning him more firmly to the bed. Izuku gasps against the sudden restriction, the cool air of the room mixing with the heat of their bodies.

“Mm, you think you’re clever, huh?” Katsuki teases, leaning down so their foreheads nearly touch. “Telling me I was already mad… trying to twist it into your little win.”

Izuku wiggles under him, a cheeky grin tugging at his lips.

“Maybe I just like it when you get a little… heated.”

Katsuki huffs, the sound half irritation, half amusement.

“You’re unbelievable.” He shifts slightly, pressing his body harder against Izuku’s.

“But… fine. I’ll let you get away with it. For now.”

Izuku shivers, a combination of the closeness, the heat, and the thrill of defiance making him feel completely undone.

“For now, huh? Sounds ominous.”

Katsuki chuckles darkly, brushing a thumb along Izuku’s jaw.

“Ominous for you, maybe. But fun for me.”

Izuku bites his lip, looking up at him with wide eyes.

“Fun, huh? I think you just like bossing me around.”

“Ha!” Katsuki snorts, his nose nearly brushing Izuku’s. “You’re not wrong. But I swear, Deku… you love it when I do.”

Izuku flushes, rolling his eyes but unable to hide the grin tugging at his lips.

“Maybe I do. Maybe I just like watching you get all… mad.”

“Mad?” Katsuki repeats, mock offense in his tone.

“You think this is me getting mad?” He leans closer, his breath warm on Izuku’s cheek.

“Baby, you haven’t seen anything yet.”

“Oh? Is that a challenge?” Izuku teases, squirming slightly under Katsuki’s grip.

“You’re asking for trouble, nerd,” Katsuki growls, though the corners of his mouth twitch into a reluctant smile.

“And you know I always deliver.”

Izuku laughs nervously, trembling as Katsuki’s hands shift to press him even closer.

“That’s exactly what I’m counting on.”

Katsuki pauses, scanning his face. “You little masochist.”

“Maybe,” Izuku admits softly, fingers brushing along Katsuki’s arm. “But only for you.”

Katsuki’s laugh is low and satisfied, rumbling in his chest. “Damn nerd,” he mutters, leaning down to press a teasing kiss along Izuku’s neck. Finally having enough Izuku pulls Katsuki’s face to his and pulls him into a heated kiss. He pours his lust and desperation making it very clear what he’s asking for.

Katsuki trails one of his hands over his arms, over his collarbone and finally wraps it around his neck. A small groan is pulled from his lips, taking advantage of the noise Katsuki slips in his tongue. Suddenly his whole body feels on fire, his body melting under Katsuki’s touch.

“For fuck sakes you drive me absolutely mad.” Izuku can feel himself hardening, and he begins to whimper when Katsuki grinds against him with the same amount of excitement.

“Don’t think your dirty little trick is going to work everytime. You fucking know how little patience I have for Kaminari.” The mention of the other blonde causes a pause.

“Katsuki. Please.” It’s the only two words Izuku can muster, his brain foggy and slow from lust. His breathy desperate tone makes Katsuki give a small groan in response. Suddenly Izuku is pulled from the bed and shoved to his knees,

“Fine. Fucking make use of your mouth. And prep yourself. I love watching the way you lose yourself while not being able to make a sound.” Before he can even release a moan his mouth is full of Katsuki’s dick. Unsurprisingly he’s thick and long, just the right size to destroy Izuku completely.

Izuku had gotten rid of his gag reflex months ago, his desire to be pleasurable was more than enough motivation. He could feel the way Katsuki twitched on his tongue, the other trying to stop himself from finishing. All because Izuku was moaning and clawing at Katsuki’s hip with his free hand. The other was stretching and preparing for Katsuki.

It’s not that the action itself was pleasant, he’s done it plenty of times but by himself it feels more invasive than sexy. But having Katsuki’s eyes on him never leaving, pure concentration left his blood boiling. Knowing the effect he had on him was more than enough.

“That’s it. You better be ready.” It wasn’t a question, more of a warning. Because suddenly he was thrown on the bed again, knees pressed to his chest. Katsuki doesn’t wait, he gave his wanting he pushes in.

The slight burn from the sudden stretch pulls a small moan already, Izuku has to bite his finger to stop any further noise. Katsuki smirks using both his hands this time and chokes him. Whatever sanity he had left is being fucked out of him right now. Pure raw pleasure courses through his body. All he knows is Katsuki, his scent, his voice, his touch. He’s all consuming.

Katsuki adjusts his leg’s position them over his own hips, it’s so he can grip Izuku’s hips and he holds them hard. His fingers press into him so hard it rips him from ecstasy, and throws him into bliss. A moan escape his mouth. Katsuki slaps a hand over his mouth and digs into him deeper.

“Shut up!!” His tone is breathless and he’s panting as well. Izuku claws at Katsuki’s back, leaving angry red scratch marks.

“Fuck.” He breathes out, his pace begins to quicken which means he’s close. Izuku reaches down to stroke himself in match with the pace Katsuki set for them. He licks Katsuki’s hand and begins to suck at the palm. The gesture and the sight are enough to send both of them over the edge.

Katsuki collapses beside him, chest heaving, a dazed laugh slipping out as he drapes an arm over his eyes.
For a moment, all that fills the room is their uneven breathing and the faint hum of the city outside. The air feels heavy and sweet — the kind of silence that buzzes with leftover adrenaline and the warmth of something dangerously good.

Izuku blinks up at the ceiling, trying to steady his heartbeat. His cheeks are still flushed, curls sticking to his temples. Then, slowly, he turns his head toward Katsuki, who looks equally wrecked — hair a mess, mouth parted, eyes half-lidded but sharp even through the haze.

“Come on, let’s get you cleaned up and tucked into bed,” Katsuki mutters, his voice low but softer than usual. He sits up with a groan, running a hand through his hair before tugging Izuku up with him. “Just stay here with me, yeah?”

Izuku lets himself be guided, still a little dazed, the warmth of Katsuki’s hand grounding him. They stumble into the bathroom, bumping shoulders and trading tired smiles. Katsuki turns on the water, testing the temperature with the same care he’d never admit to having.

When Izuku leans against him, eyes heavy, Katsuki huffs  but his arm comes around him anyway, steady and sure.

“Idiot,” he murmurs, brushing his thumb against Izuku’s jaw. “You always look at me like that.”

Izuku only smiles, a quiet, sleepy thing that makes Katsuki’s chest twist.

By the time they crawl back into bed, the city hum feels far away. Katsuki pulls the blanket over them both, his arm looping instinctively around Izuku’s waist.

“Don’t move,” he mutters against Izuku’s hair.

“I wasn’t planning to,” Izuku whispers, voice fading into the steady rhythm of their breathing two heartbeats finally syncing as the night settles soft and slow around them.