Chapter Text
“I swear to God, Deku, if you don’t get your fucking ass out of my face, I’m blasting you straight back to headquarters!”
Izuku, who’s black-whipping his way across the terrain a few feet in front of Katsuki, turns scandalized eyes to him. “What? My ass is nowhere near your face!”
“The fuck it isn’t!” Katsuki blasts his way past Izuku with a snarl. “I’m inches away from taking a goddamn bite, shithead!”
Izuku’s new hero uniform is sleek and form-fitting, with crossing supports that frame the muscles of his arms and legs nicely. Unfortunately, it’s a goddamn distraction and Katsuki complains about it to keep his hands to himself.
Izuku makes a choked off gurgle just as Hatsume’s voice comes over the commlink in their ear pieces.
“Great foreplay gentleman, you’re coming up to the location now, stay focused.”
“Yeah, Deku.” Katsuki snarks, grinning at the glare Izuku sends him. “Cover me.”
Then they’re sailing over a wide, open trench where a hideout the size of three football fields lies camouflaged in the ruins of a once sprawling city. You’d think it would’ve been easier to find the place.
“As if you’re leaving me a choice!” Izuku shouts as Katsuki propels himself into the nearest building, explosions already leveling several floors.
There hadn’t been any signs of life above ground during reconnaissance, so, why not lure them out the best way they knew? Search and destroy. Katsuki’s favorite.
Within minutes, extras are crawling out of the woodwork, firing lasers, launching debris, and flinging quirks out just like they anticipated. Katsuki’s blasting away like a maniac while Izuku delivers one-hit knockouts. Katsuki is living the fucking dream. Until Izuku’s fucking ass distracts him again, fuck!
Izuku is soaring overhead, crushing some thug’s head between his thighs, the muscles in his legs bulging obscenely. Like, how the fuck is that fair? It has Katsuki going slack-jawed for a minute, long enough to not realize that the fucking ground is cracking beneath his combat boots.
Good god, what now?
A giant reptile of a man bursts out from within the compound, the city ruins rushing to fill in the now empty space. It’s a tidal wave of buildings, cars, and pavement.
“Oh, you gotta be kidding me!” Katsuki barks, palms igniting double time to try and clear him from the area.
“Did I forget to mention him?” Hatsume’s voice crackles in their ears.
“Yes!!” Katsuki and Izuku yell in tandem.
In sync, as always, they attack the new villian with perfectly practiced combinations. Katsuki’s momentum strengthens Izuku’s gearshift while Izuku’s blackwhip redirects Katsuki’s aimed explosions with ease.
The creature roars and swings wildly, its attacks just barely out of reach. The combination of ungodly firepower and inhuman blows has it reeling in no time at all. Still, Katsuki should’ve known that a desperate villain is the most dangerous.
Before he can blink, he’s swatted out of the sky, his head snapping back harshly as the blow splits the skin across his forehead. For a second, everything goes black.
He wakes to the feeling of freefalling and Izuku’s scream of his name. He lands in a pile of rubble, a headache blooming but otherwise fine. Deku was freaking out for nothing. He pokes his head out from a crumbling window to tell him as much only for his eyes to widen in shock.
Deku is absolutely demolishing the guy.
Katsuki, stunned with disbelief and maybe a little arousal, watches Izuku’s crackling form zip from one place to the next, the glow of OFA the only thing his eyes can follow. When he does glimpse him, all Katsuki can zone in on is the stretch of Izuku’s hero suit around his goddamn thighs. God, his fucking ass is a hazard.
Izuku smashes the villain into the ground hard enough to crater the earth, face twisted in a snarl so feral that it has Katsuki adjusting his interested cock beneath the cup sewn into his suit. The thing was goddamn useless.
“Back up has arrived boys!” Hatsume crackles through their comms.
“You mean the clean-up crew.” Katsuki laughs as he makes his way over to Izuku’s form standing over the unconscious villain.
“Kacchan!”
Izuku’s big green eyes are already watery with relief and Katsuki nearly groans at the way that makes his dick twitch. Fuuuuck does he want to give him a real reason to cry.
“A little dramatic don’t you think?” Katsuki teases.
He’s ghosting his fingertips along Izuku’s waist, slyly leading him away from the incoming heroes. He switches their comms off for good measure. Izuku, too occupied with fussing over the cut on Katsuki’s forehead, comes along easily.
“You were hit so hard!”
“I’ve had worse.”
Katsuki ignores the shouts of his name as the field medic heroes try to do their job. They can wait. There’s something a little more important he needs to take care of.
Izuku is still fussing even as Katsuki pulls them into an alleyway, his gloves and gauntlets dropping to the floor. He shifts the stupid cup against his dick away with a grunt. He may have to invest in a newer one, he thinks to himself smugly.
“What if you’d been hit just a little harder? Your blood pressure would’ve been through the roof! Then you’d need—!”
“Quiet.” Katsuki murmurs, grabs Izuku’s jaw to still it and presses his thumb hard enough against his bottom lip to expose teeth.
“Kac—”
Katsuki pries open Izuku’s mouth a little wider and watches drool begin to spill over. He hums to himself before leaning over to lick it up and push it back into Izuku’s mouth with his own tongue. Izuku makes a confused noise but doesn’t fight it. Melting instead at the meeting of tongues, open-mouthed and sloppy.
Izuku pulls at Katsuki’s uniform, although in which direction is difficult to tell. He’s making these noises that only coax Katsuki to press his fingers into Izuku’s lower back. He curves him into the sweetest bow to delve his tongue deeper into Izuku’s mouth.
Izuku moans and Katsuki bites. It’s wet and loud and not nearly enough. When Katsuki pulls away, it’s only to turn Izuku and press him into the brick wall.
“You know…” Katsuki starts, lips at Izuku’s ear while he pulls the zipper at Izuku’s neck as subtly as he can, “...I think your suit needs repairs already.”
Izuku’s confusion comes out sluggish and distracted. “What do you meeean?!”
Katsuki rips the stupid, green suit the rest of the way down, the sound of the fabric tearing making him ache. At Izuku’s exposed skin, Katsuki presses himself closer, hands already dipping into the ruined suit.
“T-this really isn’t the time, Kacchan!”
Katsuki chuckles lowly, skimming his nose along freckled skin and tasting the shudders he coaxes out. “No?”
Izuku always was a terrible liar.
Izuku whines as Katsuki presses his hips against his ass, rolling his cock around the damp spot in Izuku’s underwear. He watches the darkened fabric wrap around his clothed cockhead and purrs.
“I think your cunt is telling a different story, aren’t you baby?” Katsuki teases, pressing his cock just a little harder, a little deeper.
“D-don't talk to it!” Izuku complains, embarrassed.
Katsuki licks up his spine. “Why, jealous?”
“Of course not!”
“Like it better when I tell you what I see?” Katsuki starts with a questioning hum. With Izuku's jumpsuit in pieces, it's easy enough for Katsuki to pull at Izuku's underwear. “How watching the way your pussy eats up your panties makes my cock hard?”
Izuku's on his tiptoes now, gasping when Katsuki makes him bounce. With the fabric bunched up, Izuku's slick has nowhere to go but down his thighs.
“Kacchan!”
Katsuki ignores him, choosing to continue eyeing his handiwork instead. He tugs Izuku up and down again, groaning at the jiggle it causes. He fists his cock through his pants when Izuku turns desperate eyes on him.
Allowing Izuku’s feet to properly hit the floor again, Katsuki meets Izuku’s gaze. He slowly pulls Izuku’s ruined panties to the side, exposing the wet, aching hole beneath. Izuku’s breath hitches when Katsuki licks the middle and index finger of his free hand and brings the wet digits to his hole. He circles Izuku’s pussy with a soft tease.
“Lemme watch you bounce on my hand, yeah?”
Katsuki doesn’t wait for an answer, just slides his fingers into Izuku and hooks his fingers. Izuku’s eyes roll as he clenches around Katsuki’s fingers fucking into him. Katsuki’s hand pumps just hard enough to get Izuku to spring back onto his tiptoes, up and down.
Katsuki groans, red eyes fixed on the meat of Izuku’s ass, his fingers stretching Izuku’s hole, and the slick painting the entire pink ensemble. It’s pretty, it's wet, and it's making him so goddamn hard.
“Fuck, Deku.” Katsuki growls, pulling his waistband to bunch below his balls. “Your suit really left shit for all to the imagination. I could almost see every freckle like I am right now.”
“S-shut up…” Izuku slurs, face flat against the brick. He glares at Katsuki weakly.
Red meets green again. “Can’t help but keep your eyes on me, huh, Deku?”
Sweaty, blond hair falls onto Katsuki’s eyes, blocking his view and annoying him instantly. With a huff, he pulls at his face mask and pushes it past his hairline, clearing his vision. Beneath him, Izuku makes a sound that Katsuki feels through the clench around his fingers. Katsuki gives him a knowing grin.
“That get you hot?”
Katsuki pulls his fingers away with a wet sound, curling his fingers around his cock to spread the slick there instead. Around his flushed cockhead and all the way down the thick shaft.
“Want to watch me fuck you?”
Izuku shakes beneath him but says nothing. Doesn’t matter. His eyes say everything . Katsuki doesn’t mind narrating. Afterall, Izuku loves it.
He presses his cock right against Izuku’s hole with a grin. “Your pussy opening wide just for me? Made just for me?”
He pushes in a little further and Izuku lets out a moan that sounds very much like a plea. He squeezes the bit of Katsuki’s cock that’s in him like he’s trying to draw Katsuki further inside.
“You riled me up for this entire mission Deku, I’ll fuck my cock into you when I feel like it.” Katsuki tuts as he warms the hand on Izuku’s hip in warning.
Izuku mumbles a denial but keeps still like a good fucking boy. Katsuki rewards him with a little more of his cock. Izuku moans softly and keeps an eye on Katsuki. Katsuki gives him a wink and then turns his attention back on Izuku’s cunt swallowing him up.
“‘S pretty…” Katsuki murmurs. “What a mess…”
And it is. Katsuki forces out slick as he fucks in and smears it across Izuku’s ass when he pulls out. He paints Izuku, marks him, claims him. By the time he bottoms out, Izuku’s a dirty, little wreck begging for Katsuki to fuck him.
“Pleasepleaseplease, Kacchan-!” Izuku sobs, back arched and legs spread. “Let me cum, you asshole!”
Katsuki barks out a laugh and grinds into his little hero partner as far as he can go, hips flush against him. He leans over to brush his chest over Izuku’s back and bites a freckled shoulder. “Then get to it, sweetheart.”
Always eager to please, Izuku begins to fuck himself back on Katsuki’s cock without preamble, moaning at every slap that echoes around the alleyway.
“Fuuuck, Deku.” Katsuki groans, laser focused on his fat cock pistoning in and out of Izuku’s pretty cunt, wet and red and tight .
Izuku squeezes and shakes and cries, the momentum not quite enough to get him there but still drunk on the pleasure zipping up his spine. His thighs burn, his face is a mess, and he’s so close it almost hurts.
“Lemme cum! Kacchan, please-!”
With a growl and a firm plant of his boots, Katsuki claws at Deku’s ass and fucks him . Fucks him red, fucks him messy, fucks him like he wants to bury himself inside Izuku forever. Izuku’s fingers are crumbling the brick below his hands in an attempt to steady himself.
The wall begins to crack with every spatter of Izuku’s slick on the floor. Izuku’s panting out Katsuki’s name like a mantra while Katsuki growls like an animal. He can feel the ache in his balls as orgasm rushes faster than the blood pumping behind his eyes.
“Fuckfuck-!” He grits as he slams in one last time, pressing in deep.
Izuku is coming so hard he finally crumbles the wall to pieces, squeezing around Katsuki so tight he can almost taste his cum in his throat.
When Katsuki pulls out, he’s still hard, more so at the way Izuku’s pussy drips with the biggest mess he’s seen yet. He runs a finger over the handprints left on Izuku’s reddened ass.
“Again,” he demands. You know, like a child.
Lightheaded and breathless, Izuku shoots him a look. “I am not gonna explain to the paramedics minutes away from reaching us.”
Katsuki shrugs. “Collateral damage.”
“Just zip me up.”
“Tch.”