[NSFW] FIC - "Yeah, Yeah, Yeah"

BKDK | post-canon | established relationship | pro-heroes | semi-public sex

Locker room antics.

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YEAH, YEAH, YEAH

From the other end of the locker room, Izuku let out a low hiss. Katsuki secured his utility belt in its storage unit before turning to find the other boy huffing in frustration.

Izuku’s nose wrinkled in concentration before he reached back to unzip his jumpsuit with one hand. It wasn’t working, and the way Izuku grit his teeth made it clear why.

All Might save him from useless nerds who couldn’t ask for help even with the simplest of tasks.

“Just a little bruise, huh?” Katsuki said, his dry tone earning him an embarrassed flush across freckled cheeks.

“It is,” Izuku insisted, tugging impatiently at the zipper. The small metal teeth were caught at the back of his neck in a way that required two hands to loosen. But he’d injured one shoulder protecting panicked civilians against some third rate villain, and couldn’t seem to raise his arm without pain. “Medic said it’s just a little swollen.”

Ice and rest. Yeah, he’d overheard the medic who inspected the injury. With his heavy gear tucked away, he padded over to his partner, his feet bare save for the stirrups of his body suit.

“Turn around,” he said in a tone that didn’t welcome argument. He batted Izuku’s hand away from the zipper.

With a sheepish grin, Izuku did as ordered and presented Katsuki with his back. Despite all of his costume upgrades over the years, the base always remained the same—a full jumpsuit from collar to calves. The material was sturdy, a heavy grade weave that could withstand typical quirk-related wear and tear. Katsuki’s steady hands stretched the fabric so the zipper could slide smoothly open

Izuku tilted his head, his good arm lifting so that he could brush ineffectually at the baby curls behind his ear. Dipping his head to drop a kiss against the side of that freckled neck, Katsuki smirked at Izuku’s small, happy exhale.

His lips shifted to the bump of Izuku’s spine as he slid the zipper lower. Izuku’s back was a work of art, a galaxy of freckles broken by the shooting stars and nebula clouds of battle scars. He was all tight, compact muscle, beautiful and begging for the scrape of blunt nails.

His fingertips skimmed along the dip of Izuku’s spine as he worked the zipper down to where it ended at the dimples above the swell of his buttocks. With a barely audible inhale, Izuku arched his back, hips pushing into Katsuki’s touch.

“Is this turning you on?” Katsuki teased, mouth hovering beside the shell of Izuku’s ear.

“Nah,” Izuku said lightly, even as his ears went red. So fucking cute.

“No? Because you look hot as fuck all dressed up to save the day,” he murmured, voice a low rumble. “Makes me want to rip it off.”

Izuku’s head fell back to rest against Katsuki’s shoulder, dark lashes fluttering. “Kacchan, you can’t.”

“I ain’t worried about anyone walking in on us.”

“No, you can’t because my costume is tear proof.”

“You think you’re funny now?” Katsuki growled as the nerd began snickering at his own joke like a total loser. He was lucky Katsuki loved him.

Still laughing, Izuku turned so that he could wrap his arms around Katsuki’s neck and rise on his toes to kiss him. The back of his costume gaped open, which was perfect for the way Katsuki ran his hands up all that warm skin. Laughter faded into a moan as Katsuki angled his head, deepening the kiss.

He dragged his tongue against Izuku’s, intent on tasting every crevice of his mouth and swallowing down Izuku’s needy little sounds. He did look hot in his costume with those huge fucking thighs that were only emphasized by his thigh-high leg braces. Hatsume knew damn well what she was doing when she designed them, although Katsuki wasn’t so proud (anymore) that he couldn’t admit it didn’t take much for him to imagine tossing his nerd against the nearest available surface.

Through quickening breaths, Katsuki muttered, “Jump, baby.”

Izuku didn’t even hesitate. Katsuki caught his thighs, guiding those powerful legs around his waist before he slid his palms to that luscious ass. Scarred hands cupped his face as Izuku devoured his mouth, forcing Katsuki’s head back.

It only took a couple steps to reach the solid wall of lockers. Izuku grunted quietly as Katsuki trapped him against the cold metal, giving their hips the leverage to grind together with proper pressure. With a delicious roll of his hips, Izuku moaned into his mouth, legs tightening around Katsuki, urging him as close as possible through the layers of their uniforms.

“Hurry,” Izuku breathed, back undulating, fingers clenched tight around Katsuki’s hair so that his scalp stung.

“Your shoulder,” Katsuki managed to say between the exchange of hot breaths and hungry kisses.

Izuku made an impatient sound. “It’s fine. I can take a little beating.”

“Fuck, yeah, you can.” Lips stretched into a feral grin, Katsuki gripped Izuku’s ass and rutted into him.

The sounds of their harsh breaths and desperate moans echoed in the empty locker room as each sought more of that sweet friction. Their kisses were sloppy, inelegant, all teeth and tongue and spit-stained lips.

Izuku whined, muttering breathily, “Yeah, yeah, yeah, right there, ah—”

Shit, he couldn’t get enough of his nerd. It didn’t matter how much they kissed or how often they got to soar over buildings together or how many times Izuku gave him that sweet, somehow still shy smile—Katsuki would crave this, crave Izuku, for the rest of his goddamn life.

Izuku’s mouth opened wide on a soundless scream as he came, and Katsuki licked into it, chasing the taste of his desire and letting his frantically bucking hips push Katsuki over the edge.

They didn’t get to savor the afterglow, however, because a moment later, a very flustered-sounding Kirishima called out, “You guys have to stop doing this.”

~fin