Thread by @bunbundiegle

#MHAKinkmas2022 Day 2: Sex Pollen/Quirk Accident #bkdk top!bk, bottom!dk, rimjob, fingering, semi-public sex, spit as lube, semi dub con? It's basically a sex quirk y'all

Katsuki was having an absolutely awful, god-shit, motherfucking day.

On an endless list of minor annoyances all piling up over the course of the day–his coffee machine breaking that morning, a bird shitting on his head, some asshole extra closing the elevator door shut while maintaining eye contact (never mind that the extra's eyes were full of

fear, but still!)–but the thing that broke the proverbial camel's back was, of course, Deku.

Today happened to be the day Deku's current costume was in for repairs, so he had to wear his old one.

Which was just a little too small for him.

Deku's fucking thighs were nearly splitting at the thing's seams, the fabric so tight around his ass and hips that it was practically a second skin. Every time he crouched to Float into the air while on their joint patrol, Katsuki felt himself break out in a cold sweat.

He thanked every fucking god in the universe for his baggy pants. (And cursed them simultaneously for Deku's fucking cake of an ass. Fuck, Katsuki wanted to have his cake and eat it too.)

And on top of all that bullshit, Katsuki let one of the villains they were chasing get away. No, it wasn't his fault. It was Deku's. Because Deku decided it was a great idea to suplex the villain's partner and distract him.

So the shitty ass bank robber villain was cackling like mad, his quirk puffing out from him like he was Thomas the ducking Tank Engine, getting it all in civilian's faces, sending them fucking off in every direction.

"He's making a break on Sixth!" Deku called through their comms, leaping after the villain while Katsuki blasted over the rooftops.

"I fucking got him!" Katsuki snapped.

"Do you, Kacchan?" Izuku laughed and Katsuki wasn't sure if he wanted to punch him or kiss him because that sound was like fucking angels singing or something and the goddamn sass sent a tremor through Katsuki's gut.

Prick.

Katsuki shot to the right and flew down between the buildings, immediately spotting Thomas and derailing his escape. He landed heavily on his back, boots digging into his spine. The villain wheezed, breath puffing out in thick puffs of gray-green smoke.

It billowed into the alleyway, immediately flying up Katsuki's nose.

It stank like week old leftovers and something minty at the same time.

Fucking gross.

"Stay down, you rat bastard," Katsuki pressed his boot down harder when the asshole tried to squirm away. He coughed as more of the smoke filled the air. He tried to wave it away, but it stuck around to cling to him.

Shit, the nasty ass smoke was this guy's quirk. What was it again? Something to do with making people leave? Apparently, the majority of the employees back at the bank had just up and left work when this guy came in huffing and puffing like the Big Bad Wolf.

Damnit.

"Yes sir, Dynamight sir, please don't kill me. You don't want to kill me, right?" Thomas the Cowardly Engine simpered.

Katsuki growled. "I don't wanna fucking kill you, asshole. I wanna–"

Katsuki cut himself off as he heard the telltale hops of Deku rounding the corner.

"Oi! Asshole! Stay the fuck out of this shit!" Katsuki snapped back to his hero partner. He wished he had his winter costume. He could at least use the collar to cover his nose from the stench.

Deku, the idiot, didn't listen fast enough. He stumbled to a stop, gasping at the sight of the smoke curling around Katsuki and stared.

"At least use your mask, idiot!"

Deku fumbled to press his usually useless breathing apparatus to his face, brows furrowing.

"Kacchan?" Deku sounded hesitant, confused. A little curious. "Are you okay?"

"I'm fucking pissed and goddamn horny as hell, what do you think!"

Uh. That was not what he'd intended to say. What the fuck.

Deku's brows shot up. He was silent for a moment. Then the mumbling started. "Y-You're… uh. How long exactly has it been since he used his quirk? No more than twenty seconds, given the velocity Kacchan flew over the roof.

Even calculating for wind resistance, and assuming the smoke was already activated, then–"

"Oi!" Katsuki barked.

Deku turned to look at him, eyes wide. Goddamn. Katsuki felt every muscle in his body tremble at the sight of the dewy eyes and open expression. Where did Deku get off being so fucking precious looking?

"Kacchan has incredible self control… Most of Inhibitor's victims are immediately affected by his quirk…"

Fuck, the mumbling was back. And the way Deku was looking at him did awful things to his gut. His traitorous dick started to fill out.

He just wanted to fuck him against the wall.

Something within Katsuki snapped.

It was like his vision narrowed down to a singular point, the only thing that mattered right then and there was Deku, and Katsuki felt as if he'd die if he didn't get to the nerd.

Then he was stomping across the alley, shoving Deku against the brick wall, and, after tearing his stupid mask off, sealing their mouths in a heated kiss.

"Ka-Kacchan!" was all Deku managed before he was moaning into the kiss.

Katsuki was only aware of the blistering heat that was Deku's body pinned between him and the wall, the feeling of Deku's breath ghosting over his lips as he needily gasped for air, then kissing him like he needed Katsuki more than the breath in his lungs.

Katsuki only cared about the feeling of verdant curls between his fingers, of the pressing hardness when he slipped a thigh between Deku's legs. Of the way Deku's plump lower lip felt when he bit at it, soothing it with a swipe of his tongue.

Katsuki twisted his head, kissing down along Deku's jaw before latching onto his neck, just below the ear, to suck. Deku tasted like sweat and lightning, like his very skin was crackling with his quirk. Deku groaned, hips bucking up against Katsuki.

Katsuki felt the building desire roiling like a storm in his gut. He didn't give a fuck anymore where they were or what was happening–right now, all he cared about was getting as much of Deku to be touching as much of him as possible.

"K-Kacchan, wait–"

"For fucking what?" Katsuki snarled into Deku's skin, fumbling with the zipper at the back of his stupidly small jumpsuit. "I've been waiting for fucking years, asshole. Better make it good."
"Years?" Deku squeaked. "Wait, really? Kacchan, you've wanted to kiss me for that long?"

Katsuki pulled back to glare at Deku's stupid (adorable, endearingly flushed) face.

"What? No." Katsuki snapped, eyes raking over every freckle on his cheeks, fingers still desperately clutching at the zipper. Deku's face seemed to crumble at that, disappointment and confusion mingling.

"I've wanted to fuck you since high school, nerdass."

Deku somehow blushed even harder, going full strawberry.

"Um!" Deku's voice cracked in a way it hadn't since before puberty. "You wanted to– but Kacchan doesn't– me?"

"Yes, you, fuckface! Have you seen your fucking ass?" Katsuki dove right back into Deku's neck, mouthing at the now exposed skin as he manages to slip one shoulder free of the costume. "Fucking thick ass thighs, wanna fucking suffocate by those thighs. Fuck."

"Kacchan, we shouldn't…"

"And your fucking mouth, Deku. Fuck. Would look so good on my cock." He kept going as if the nerd hadn't interrupted.

Deku groaned, head thrown back into the wall.

"Wanna hear all those pretty little noises while I rail you. Fuck, do you know what you do to me Deku?"

"Kacchan…" Deku sounded broken, like he was falling apart. Fuck, he even sounded hot.

"This," Katsuki growled as he sucked another mark into Deku's neck, taking one of Deku's hands and placing it on his crotch. His erection was unmistakable.

Just the sensation of Deku's hand on his dick through the layers of their costume sent heat zinging through Katsuki.

How had he ever kept himself from doing this before?

"Kacchan, we should at least go–"

"I'm not leaving until I've eaten you out and you've come on my cock, Deku."

Deku whimpered. Katsuki, finally having had enough of waiting, tore the zipper straight down to where it met Deku's fantastic ass. He spun him around, so Deku had to slap his hands against the wall to keep from breaking his nose against the brick, and Katsuki +

yanked his hips back so he could slide the offending fabric off. The freckles globes of Deku's ass were perked and perfectly framed by his costume.

Katsuki nipped at the Japan's Sweetheart's ass, the flesh giving under his teeth. Deku gasped and writhed in Katsuki's gasp, pressing his hips back and closer to his teeth. Fuuuck.

With one round cheek firmly grasped in each palm, he spread Deku apart, revealing a twitching, pink hole. Without even a second's hesitation, he dove right in, tongue lapping at the rim, spreading spit everywhere.

"Kacchan!" Deku mewled, sounding breathless already.

"Don't tell me no one has ever eaten you out before," Katsuki growled between bites of his meal.

The only response was a heavy groan and Deku grinding his ass onto Katsuki's face. He snickered, tongue fucking the man he'd dreamed about on a near nightly basis for years.

Katsuki introduced his fingers one by one, first slowly spreading Deku open before scissoring his fingers with a twist of his wrist when he started finger fucking him.

The sounds Deku was making were better than anything Katsuki's imagination could ever come up with. He sounded downright pornographic.

"That's it," Katsuki growled, three fingers in to the knuckle, curling and pressing against the bundle of nerves that left Deku damn near wailing, "Wanna hear you. Wanna see you come undone."

"Katsuki!" Deku moaned and the sound of his name send fire through him.

Katsuki reluctantly pulled away. As much as he wanted to see the nerd come on his fingers and tongue, he wanted to come inside him more.

"Fuck, gonna fuck you now, 'zu." Katsuki growled, spitting into his hand and pulling his aching cock free. He slicked his dick as best he could while the nerd breathed heavily against the wall.

Katsuki gripped Deku's waist and spun him around, then lifted him in one motion that left the nerd squeaking and wrapping his limbs around Katsuki, arms threading around his shoulders and legs holding his waist in a vice grip.

Katsuki groped Deku's ass, spreading his cheeks as he pushed him against the wall.

"Ka-Kacchan, please. Please. Want your cock, please!"

Fuck, Deku begged so pretty. Katsuki would give him anything he want, everything he needed.

"Wanna give it to you, baby. Gonna fuck you." Katsuki growled, claiming Deku's mouth into another biting kiss. He guided his cock to Deku's hole and pushed against the resistance.

They both groaned deep as Katsuki's head pushed past the rim. Then he was slowly lowering Deku onto his cock, hips bucking just enough to fill him.

When Katsuki was fully seated, he swore he saw God. And God was a freckled green-haired hero, flushed from head to toe, mouth opened in a wild moan, throat bared and crying out Katsuki's name.

He barely registered that he'd started ducking up into Deku, his back no doubt getting scratched up by the wall. All while Deku clung to him desperately, like a life raft in a stormy sea, nails digging into the fabric of his skin tight costume to trail lines of fire down his back

Katsuki grunted like a fucking animal, face buried in Deku's neck as he pounded up into him. The sounds of their skin slapping against each other echoed down the alley. The drag of his cock within Deku's tight heat was better than anything he'd ever experienced before.

He never wanted to stop.

He angled his hips, desperate to seek out Deku's prostate. When he found it–when the nerd cried, "Yes, yes, there! Katsuki! There!"–he pounded into it without remorse.

Before long, Deku moaned, "Ka-Kacchan, gonna… I'm gonna…"

"Do it. Come on my cock, baby. Fuck. C'mon, you can do it."

Deku let out a strangled cry, spasming and clenching around Katsuki's cock. His seed spilled between them, fucking both of their costumes, but Katsuki couldn't care less.

A few more thrusts later, his rhythmic pounding grew erratic and with one final, hard buck, he buried deep in Deku's ass, finally halting as he spurted hot cum in him.

Katsuki fell gracelessly to his knees, limbs trembling. Deku curled into his chest, panting. The haze lifted from Katsuki's mind shortly after and he blinked back to reality, stomach sinking. He stiffened even as his arms tightened around Deku's shaking body.

What the fuck did he just do? Over a decade of careful self control around the nerd had just been thrown out the fucking window. And how? How did this even happen?

"It's Inhibitor's quirk," Deku murmured, as if he could read Katsuki's mind.

"It's called Deepest Desires. It shuts off your brain's inhibitors and gets you to do what you really want to do. S'why the bank employees just walked away. They didn't want to be at work, so they went home. S'why you…"

"You're telling me that fucker used the fact that I loved you to get the fuck away?" Katsuki growled, low and deep. Because now that he looked around, he noticed the alley was missing one Thomas the Tank Engine.

He was going to kill that motherfucker when he found him.

Until Deku spoke up, and all the blood in Katsuki's veins turned to ice.

"You love me?" His voice was tiny, timid. Hopeful.

Katsuki looked down to find Deku staring at him, eyes wide and wet with the threat of tears.

"S'what his quirk does, right? Use that kinda stuff against me?"

Deku shook his head. "It makes you do what you want. You wanted to kiss me, to f-fuck me." He stuttered through the curse word. It was annoyingly adorable.

Katsuki huffed and looked away. "Yeah. Well."

Deku beamed brightly, "You love me."

Katsuki clicked his tongue. "Don't fucking start with that shit."

"But I love Kacchan too!" Deku wrapped his arms around his torso and squeezed him tight.

"Fucker, get off. We need to track down that asshole and kick his ass."

But Katsuki just squeezed him back. He wanted to hug and hold the nerd too, he wasn't just a horny bastard.

Deku didn't move at first, seemingly relishing the embrace. He did eventually sit back with a wince. Katsuki helped him stand, zipping up the costume as best as he could.

At some point while he'd been fucking Deku against the wall, it had ripped along the zipper line. Katsuki tucked his now soft cock back in his pants and that was when he realized that both of their costumes were coated in dried cum.

They couldn't run off after that villain, let alone finish their patrol like this.

Deku seemed to realize the same thing around then, and be buried his face in his hands.

"I think Shouto in on patrol nearby." He moaned, voice tight in embarrassment. "I'll radio him and we should head back to the agency."

"Or," Katsuki dipped his head to murmur against the shell of Deku's ear, "we can head to my place. It's not far."

Deku glared at him briefly before slipping his hand into Katsuki's and intertwining this fingers. He smiled before Floating the both of them up into the air with a crackle of green lightning.

"PR is going to hate us if anyone saw any of that, you know."

Katsuki smirked. "Fuck 'em. That's tomorrow's problem."

[end]

Hope y'all enjoyed that! ☺️ I had a feral need for some wall fucking. 👀

lo-fi.com/bundie

Oops, that's supposed to be ko-fi.com/bundie! Stupid auto correct 😩 no pressure but tips are always squee'd over!!

And link to the whole Kinkmas index thread:

https://twitter.com/bunbundiegle/status/1598447480424878088?t=At2QVSgCb03NLbxukyydHA&s=19