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Don't Touch, Kacchan

Summary:

Katsuki is an asshole, and alcohol doesn't help that at all. What it really does, in Izuku’s opinion, is turn Kacchan into a live wire, something needing to be grounded. If you asked Katsuki? Alcohol was the only way he could admit to needing a firm hand.

OR

Katsuki is being a dick at the bar, and Izuku reminds him who’s boss.

Notes:

Tale as old as time - long time lurker, first time poster.

The Tumblr Kinktober 2025 prompt list really got me. I won't be able to keep up, but I'm hoping to go at my own pace and post each day as I write them.

Day 10 prompts -
- Oral sex
- Punishment
- CNC

Work Text:

Katsuki hits the ground hard, knees throbbing in time with his cock. Deku gives a sympathetic grunt, but then is too busy pressing his hips forward to shove into his Kacchan’s flushed face.

And this is how they work. How they’ve been working for the last few months. Alcohol changes them both, makes Deku treat Katsuki a little mean, makes Kacchan want to be nice for him.

Deku’s eyes blaze, and he shoves Katsuki back just enough to make the rocky ground bite into his knees. “Apologize.”

Yes. Of course. Anything to get that cock in my mouth.

“If you just shut up, I’m going to give you the best blowjob you’ve ever had in your life.” Katsuki reaches forward to shyly play with the waistband of Deku’s pants.

If he were less intoxicated, he might have played the long game. Might have kept snarling and bucking until Deku is irritated enough to put him in his place. But he doesn’t have that kind of time. Not tonight, here, on his knees with mystery liquid soaking into his pants, on the ground by the neon exit sign.

He doesn’t have the time to bully Deku into scruffing him. Deku already knows that he needs to be handled. Nice doesn’t get Katsuki what he wants, but it’s better than nothing at all. Deku knows that too, and he likes that Katsuki pretends for him anyway, with gentle kisses and fluttering lashes and a clumsy clambering into his lap.

Their friends will all be waiting for them to come back in. They are probably making their stupid bets, picking who walks in first, who is still pissed off, who looks appropriately cowed.

When Katsuki glances up, Deku is silent, chest heaving, those big green eyes dark and wet, and all of his intense focus is directed at Katsuki. Like always.

He slinks his way up to full height again, just close enough to ghost a breath over Deku’s face, pressing a kiss to the bobbing throat that waits for him. He sweeps his fingers along the soft edge of his ear, and murmurs softly. “I’ll be so good for you.”

With no more notice than that, just one sentence to put them on the same page, Katsuki drops once more onto the ground. He grabs Deku’s muscular hips, and yanks him close enough to again press his hot mouth against his stiff cock.

“Kacchan,” says Deku, and he sounds half angry, half aroused. Katsuki only laughs into his crotch, and inhales as deeply as he can. There is absolutely nothing that can ever compare to the musky smell of Deku’s arousal. He can feel a fluttering heartbeat against the tip of his nose, and when he presses there just a bit harder, Deku is groaning. “Kacchan.”

“Yeah, nerd. Okay.”

One of his hands gathers Deku’s joggers and boxers in a tight grip, and the dumbass takes the hint to start shimmying his pants down to his knees. With his other hand, Katsuki hooks the waistband of his own clothes to sit snugly under his tight balls.

“Kacchan. Don’t touch.”

“I get it, nerd,” he chokes out. Katsuki’s hands tighten around the backs of Deku’s knees, and then he dives in.

His thick clit is large and lively, jumping to kiss the roof of Katsuki’s mouth, already slick with his arousal. It only takes a few rhythmic sucks before Deku is shuffling forward to press his dark pubes against Katsuki’s face. Katsuki steals a breath through his nose, and tightens his hold. He knows that this pussy is more important than breathing, knows that Deku feels the same way. The only thing better than tasting Deku is suffocating on him.

Izuki slips a hand down his tight stomach to press his forefinger and middle finger against his chubby lips, pressing them flat to bring his clit to sharp relief.

Katsuki can’t say that he’s ever had particular fantasies about Deku’s pussy before their arrangement. A gay hero in the top five? Yeah, there’s always been more than enough ass to go around. But after getting fucked by Deku, no - after being trained, Katsuki can honestly say it wouldn’t matter if Deku was a fucking Ken doll.

None of those extras could ever taste like this, or would dare fuck forward hard enough to swell his lips and make his nose smart. He lets his jaw relax, stiffens his tongue to give Deku the pressure he is searching for.

And when Deku yanks hard on those blonde locks, Katsuki knows to shuffle even closer and shove two fingers into his warm pussy. He is soft and hot inside, and the feel of him is always a shock to Katsuki’s nervous system. Katsuki’s slides his remaining hand up to lie still on Deku’s chest, or else he’d be tempted to rub himself off.

Deku tugs harder on his head, spreads himself even wider, and goes wild. He thrusts down on his hand, and bucks forward to chase Katsuki’s wet mouth. Within minutes, Katsuki is feeling the familiar ache of his wrist sharpen into pain, but he holds firm against Deku’s thrusts. His clit slips out of his suckling mouth as often as it presses back in, trailing short bursts of heat across his nose, lips, cheek. Those crooked hands slide to grip the back of Katsuki’s skull, and now Deku is grunting in time to his thrusts against Katsuki’s face, hissing every time a sharp tooth clips his clit.

Katsuki moans with him and lets his neck go limp. As his head is roughly jerked into position, angled just right, he slides his long finger alongside the damp heat of his ass cheeks. He presses against him just gently enough to feel his ass flutter, and then he slides home.

That’s all it takes to finish Deku off, both of Katsuki’s hands on and inside and touching him, his flushed cock untouched and throbbing against the cool evening breeze.

And before Deku even has a chance to reach down and lift Katsuki's damp head from its resting place against his hips, and Katsuki bursts onto his own two feet to lick into Deku’s mouth in a vicious kiss. He is panting hotly against his face, imagining his cock bullying its way into that tight ass. If he fucked him from the back, Katsuki could curl his broad shoulders around Deku and work his fingers into that slick velvet heat at the same time.

And then Deku springs forward to take his purple cock in a grip that is far too tight. Katsuki groans and drops his head onto his shoulder, biting back a whimper as he only squeezes harder. It’s easy to hide his face here, easy to pretend that he doesn’t know what Deku looks like right now, easy to act like he doesn’t care if Deku will be sweet or cruel after breaking apart on Katsuki’s tongue. .

“Go home, Kacchan.” Deku allows Katsuki to kiss along his sweaty neck, feeling delirious and pleased and angry. Katsuki is only feeling the drinks and a bone-deep need for Deku to hurt him. “Text Kirishima. Apologize.”

Katsuki hums, swaying on his feet, still nuzzling into his shoulder.

“And don’t touch yourself. Wait for me.”

And then Katsuki does the hardest thing that he’s ever done in his life.

He watches Deku arrange his clothes. Watches him pat his hair into place and check his phone. Watches as he walks away, back into the club.

Katsuki turns around. Instead of going where he wants to be - at Deku’s quaint apartment, begging to be fucked, undressed and chest pressed to the rough carpet, whining at Deku about wanting the big yellow strap this time - Kacchan goes home.

Kacchan goes home. He texts Kirishima. He absolutely does not touch himself.

He waits for Izuku.