[NSFW] FIC - “Get a Room” Chapter Three

First two chapters here ✨

A/N: please note that this is unedited and rough lol

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IV.

“Hey Deku, are you and Uravity a thing?”

Every hero in the onsen turned to stare, first at the man who’d spoken and then at Katsuki, who raised one eyebrow.

He and Izuku had never hidden their relationship, but being extremely private people, they didn’t broadcast it either. They were hero partners, so it wasn't unusual to see them together, in or out of costume. Few people assumed they were anything more than that.

“She's just a friend,” Izuku said with a strained smile.

Oblivious to the rising tension amidst his fellow heroes, the guy–Sakiyo something or other, hero name Bubble Boy–laughed and said, "No way that's true. You were practically reading each other's minds out there."

'Out there' was the battle they'd just come from after a police sting had gone wrong, forcing authorities to request backup from any available heroes. None of them were even local to the area. They'd all simply been passing through when the call for help went out.

“And I remember watching you guys in the UA Sports Festival,” he continued. “The eye contact was insane.”

Nearby, Kaminari sank lower into the steaming water and mumbled, "Please stop talking—I can't afford any property damage claims."

“It’s really not like that,” Izuku protested, going alarmingly red even for being waist-deep in a hot spring.

Sakiyo angled him a dubious look. “Well, have you tried? It’s really obvious, Deku—she’s super into you.”

“Yeah, so I’m gonna head up,” Kaminari said, abruptly rising from the water. “If I’m not present, I can’t be charged as an accomplice.”

Katsuki snorted at that. He knew Kaminari didn’t really think he would explode this yapping idiot for making assumptions about Izuku and Uraraka. The idiot was just trying to convey how this wasn’t a great topic of conversation among strangers. But as irritating as it was for this clueless extra to mistake Izuku’s intense eye contact at their third year sports festival to have been with Uraraka instead of the person sitting behind her (Katsuki, duh), it at least also presented an opportunity to fuck with him.

Something in Katsuki’s expression must have given away the direction of his thoughts—or Izuku was really good at reading him, either were just as likely—because Izuku’s nose wrinkled with the barest of disapproval. Katsuki flashed him a grin before addressing Sakiyo.

“You know Deku’s a war hero, right?” he asked snidely. “Do you even know what it means to defeat the most powerful villain in the world? He's pretty much got a target on his back for anyone looking to get revenge.” Which wasn’t entirely true, seeing as the majority of AFO’s underlings fled Japan in the wake of his defeat, but for the exceptions, Katsuki had his back covered.

Sakiyo obviously didn’t know that, though, because his eyes had gone wide with realization. “I get it!”

Katsuki seriously doubted that.

“That’s why you haven’t made a move on Uravity,” Sakiyo said, shaking his head in pity. “She’d become a target, too. Damn, that sucks, but that’s pretty heroic of you.”

Izuku pinched the bridge of his nose. “You’ve got the wrong idea. I don’t—”

“Just means he’s gotta keep any partners he has a secret,” Katsuki interrupted.

Sakiyo's eyes lit up. A conspiratorial grin curved his mouth as he shifted closer. “You guys are a hero duo—you must know some of those ‘secret’ partners, right?”

“Only one,” he said, meeting Izuku’s annoyed gaze.

"You gotta tell me," he said, scooting even closer into Katsuki's personal space.

He wasn't a prude about nudity, but this extra needed to give him some fucking room.

"Come on, is she a hero, too? Do I know her? Are you sure it isn't Uravity?"

"It's not," Izuku said, louder now. "I'm really not sure why you're set on thinking…"

Katsuki's nostrils flared in irritation as Sakiyo put one wet, muscular arm around his shoulders, naked thigh pressed to his own beneath thick plumes of steam. He didn't realize Izuku had trailed off until there was a sudden movement, a rush of hot water, and then the other man was gone from his side.

“Wha…” Sakiyo blinked stupidly from where he was now sitting atop a flat stone at the opposite end of the hot springs, a towel tossed over his groin. He cupped his head and wavered, as if hit by sudden vertigo

In his place beside Katsuki, Izuku rested his head on Katsuki’s shoulder. Katsuki had to bite the inside of his cheek to keep from snorting.

Izuku smiled serenely. "The heat might be getting to you, Sakiyo. I'm sure cooling off will make you feel better."

"Yyyyeah," he said slowly, looking baffled and wary."I think I'll do that."

No one spoke as Sakiyo rose from his perch and swiftly departed. Once the doors leading back into the bathhouse were closed, Izuku turned on him.

"Kacchan, don't do things like that." He looked absurdly adorable, his skin flushed pink and limp curls lying flat on one side of his head.

"What? Mess with extras who don't know shit?" he asked.

With those big eyes, Izuku's glower was wholly ineffective. "Give them ideas about me and Uraraka-san. I don't want people thinking we're like that."

Katsuki's lips stretched into a wide, mocking grin. "Is that really what's annoying you about this?"

Izuku instantly tensed, his already pink cheeks going even redder. Bull's eye.

"Of course it is," Izuku said quickly. "Doesn't it bother you when people assume I'm with someone else?"

"Sometimes," he conceded. "When it's coming from someone who should know better." He leaned forward, prodding the tip of his tongue against one sharp canine and smirking at the way Izuku's eyes followed the movement. "But I think what you really 'don't want' is people thinking that because you're taken, it means I'm available."

By the way Izuku's brows twitched together and his scowl intensified, Katsuki could tell he was right.

Almost petulantly, Izuku mumbled, "He was trying to get close to you. It was super obvious."

Katsuki tilted his head, exposing the elegant line of his neck. "Oh yeah? And you think I woulda let him?"

"Of course not," Izuku said, a spark of annoyance returning. "But he was practically in your lap already."

Katsuki slowly straightened. Water sluiced down his chest and the planes of his belly. The water was only waist-deep and relatively clear so there wasn't much aside from steam to conceal the pale patch of hair just beneath the water's surface.

"Green's always looked good on you," he said, bracing his elbows atop the stones behind him so that his chest thrust out. Izuku's hungry gaze traced a droplet of water down the swell of his right pec.

"You're being mean, Kacchan." Izuku sounded a little breathless, but his eyes had gone dark with desire and a laser focus that made Katsuki's dick start to thicken.

He loved riling up the nerd, and even though Izuku knew what he was doing, he always went along with it anyway because he enjoyed it just as much. Izuku liked being provoked, liked the excuse to be more assertive (not like he actually needed one though), to be rougher and harder and just shy of rude.

"Too bad you can't do anything about it, eh?" Katsuki said, spreading his legs beneath the water. "Because someone decided it'd be a better idea not to room together."

Izuku's reply was automatic, something he'd been telling both himself and Katsuki since they left Musutafu. "We have to be up early, and if we share a room, we'll never get any sleep."

Katsuki snorted. "That's a bold claim. We haven't fucked in almost two weeks thanks to your shitty work schedule. Doubt you'd even last long enough to get me off."

Green eyes narrowed. "Guess we'll see."

Even though he saw it coming, Katsuki still allowed himself to be flipped around and pressed into the smooth stones placed around the water's edge, Izuku tight against his back . A rough hand gripped his hair, keeping him bent low, his ass cradling the thick girth of Izuku's hardening cock.

"That it?" Katsuki asked, even as his breaths came faster in anticipation. "You're not proving me wrong here. Maybe we should call that bubble extra back, see if he's more useful."

He could feel Izuku trembling against him, the other boy's restraint a threadbare thing. "Maybe," Izuku murmured against the shell of his ear, "if I fuck you right here, you'll scream my name so loud that the entire inn will know who you belong to. They won't be assuming you're available after that, will they?"

Swallowing back a moan, Katsuki rolled his hips, trying to get the damned nerd to slip inside, even just a little. His dick had gone from half-mast to fully hard, and he was aching for contact.

"You sure you're that good, Izuku?" Katsuki licked his parched lips, breaths shuddering as Izuku leaned in to steal a taste. "It's, nnnf, it's been a while. Might've forgotten." He winced as Izuku's fist tightened around his hair and pushed him a little harder into unyielding stone.

"I don't think you have," Izuku whispered, mouthing at his jaw. "But if you want me to fuck you that badly, then all you had to do was ask."

Katsuki closed his eyes, groaning softly as the length of Izuku’s erection slid down the seam of his asscheeks. It was so close. Izuku’s heavy breaths washed across his overheated skin, and he welcomed the weight of Izuku’s body despite the stone beneath him.

“Wash up and meet me upstairs," Izuku said, and then suddenly, the weight of him was gone, leaving Katsuki aching and empty and unbearably horny, that fucking assnerd.

***

Although the hallway was quiet when Katsuki headed to his room for the night, he could hear the faint murmur of voices from behind the neighboring door. One of them sounded like Kirishima, which made the corner of his lips hitch. Kirishima was supposed to be sharing a room with him, but if he was now in what had previously been Kaminari and Izuku's room, then that meant…

As he expected, Katsuki found Izuku sprawled atop one of the twin-sized beds and playing on his phone. He was dressed in only a fluffy towel that had ridden up against the bedsheets, revealing the plump curve of where ass met thigh. He nudged the door shut with his foot, reaching back to lock it without looking away from Izuku.

“You fixed the room assignments. Good,” Katsuki said, removing his own robe. He smirked as Izuku dropped his phone, all his attention diverted to Katsuki's bare shoulders.

"Kacchan," Izuku began, rolling onto his back. It was all he could get out before Katsuki dropped his robe to the floor and crawled on top of him.

Their mouths met in a heated kiss, Katsuki's hand pushing impatiently at Izuku's robe, fingers digging roughly into soft skin. Once Izuku got his arms free of his robes, he flipped them.

Katsuki was too horny to complain about it, landing on his back with a thump and a short whoosh of air that was instantly swallowed up by Izuku's mouth. Above him, Izuku rose to his hands and knees, gaze roaming the pale skin riding over muscle and tendon, broken by the rivulets of scars from the war.

He lowered his head, lips caressing the white line that split down the center of Katsuki’s chest. His tongue flicked out to smooth across the scar before his lips moved a nipple.

Katsuki couldn't be bothered to hold back his moan, loving the way it always seemed to make Izuku kiss him harder, hold him tighter, fuck him deeper. He closed his eyes and forgot that they were in a rented room at an inn and that the walls were thin enough to hear the lyrics to Kaminari's shitty taste in music. All he knew right then was Izuku’s teeth nipping at his skin, his mouth sucking marks across his ribs, the dip of the mattress as Izuku shifted his weight so he could lick down Katsuki’s stomach.

He gasped as Izuku gripped his thighs and pushed his legs apart. One hand moved to cup Katsuki’s erection, his fingers sliding up the entire length, from the sensitive flesh of his balls to the damp tip of his cock. His thumb brushed over the slit, coming away slick with clear fluid. Katsuki watched as Izuku brought the finger to his mouth and licked it off.

Izuku smiled and lowered his head, his tongue pressing against the underside. He palmed the soft skin of Katsuki’s taint as he opened his mouth over Katsuki’s cock, his lips clamping over the thickness as he worked his way down and sucked roughly back up.

Katsuki growled beneath him, curses and half-finished pleas escaping him. Coming up for air, Izuku grinned at him, green eyes dark, pupils blown with lust. He licked his middle finger, slowly so Katsuki wouldn’t miss a second of the thick, slightly crooked digit sliding into his mouth and returning glistening with saliva.

Tilting his head back, Katsuki gulped in air and forced his body to relax as Izuku pushed his finger into him. There was the initial discomfort, the sensation of being filled. He took another breath to steady himself, letting the tension drain from his limbs. His fingers relaxed on Izuku’s biceps, leaving bloodless marks on the tan skin.

“Are you okay?” Izuku whispered, concern creasing his brow. It was a departure from his behavior in the hot springs, but Katsuki didn't mind. He only nodded, his hand moving to Izuku’s face and caressing a scarred cheek.

“Don’t stop,” Katsuki murmured, eyes closed. He wanted the pressure, the delicious burn and stretch of having Izuku inside. The thought made him shudder with anticipation. It had been too long.

Izuku suckled gently at the tip of Katsuki’s cock, tonguing the tiny slit that tasted sharp with precome. He twisted his fingers as he inserted a second one. Katsuki grunted, pushing his hips down for more and then whining when instead, his fingers withdrew.

Glaring down his body at the crown of green between his legs, Katsuki watched as Izuku kissed down the length of his cock and then licked across his balls with the flat of his tongue. Then he unceremoniously shoved Katsuki's legs up so that he was completely exposed, angled his head lower, and expertly probed his tongue into the soft skin of his entrance.

If he could have, Katsuki’s back would have arched off the bed. As it was, bent in half and held down by strong arms gripping the back of his thighs, Katsuki could only cry out, a litany of swear words filling the space between them. The muscles in his stomach clenched and strained as Izuku’s tongue stretched him open. His hands gripped Izuku’s hair, the sheets. His breath grew ragged, his limbs trembling.

When Izuku finally pulled back, Katsuki slumped into the mattress, his cock dripping and his head swimming. “Izu… please. I need…”

He felt Izuku smile against his inner thigh before sucking harshly on the soft skin. With a grunt, Katsuki bucked his hips, half hoping his dick slapped the shitty tease in his cute fucking face.

Laughing quietly, Izuku surveyed the marks he’d left on Katsuki’s thighs, looking pleased. Katsuki was used to wearing Izuku’s marks, loved it in fact, but they’d all faded over the past week. He was relieved to have them renewed.

Finally, Izuku crawled up over Katsuki’s limp body, his mouth mapping the dips and angles of muscle as he made his way back upward. He dropped light kisses to Katsuki’s jaw, his cheek, the corner of his mouth. Katsuki turned his head to catch Izuku’s lips, forcefully sucking Izuku’s tongue into his mouth and then biting down hard enough to elicit a muffled yelp from the other man.

“Hurry up,” Katsuki panted, digging his nails into Izuku’s back. The way Izuku clenched his jaw against the sting offered only a moment of satisfaction.

Then Izuku was hitching Katsuki’s thigh high over his hip and reaching down between them. He startled when slick fingers found his loosened rim. The nerd must have found the lube in Katsuki’s bag when he swapped rooms with Kirishima. Katsuki hadn’t even noticed the bottle on the bed.

“Kacchan, you’re so hot inside,” Izuku moaned, dropping his forehead to Katsuki’s chest even as he worked a third finger inside. “So tight. So beautiful.”

“I’m not a pillow,” Katsuki said without any heat. “Fuck me or get off.”

“I dunno, feels pretty comfy to me.” He nuzzled into the crease between Katsuki’s generous pecs.

Katsuki was torn between wanting to kiss the man or suffocating him in his tits. The freak would probably love that.

When Izuku’s fingers brushed over his prostate, Katsuki shuddered, thighs clenching around his waist. By the time Izuku slicked himself and lined up the tip with his entrance, Katsuki felt like he could explode, literally and figuratively.

Izuku’s eyes were riveted to where they were connected, pink tongue caught been his teeth as he pushed in. Katsuki couldn’t help the sound that escaped him, an embarrassingly needy thing. 

“Fuck, fuck, fuck,” Katsuki mumbled, helplessly twitching his hips to take in more of him. He felt so good, so full, and he needed all of him right the fuck now already.

“Are you okay?” Izuku breathed, his expression twisted into almost pain as he braced his weight on his forearms, green curls falling over his brow. Katsuki gripped his hips and jerked him closer, urging Izuku to move. “Shit.”

Thankfully, the nerd finally did. He withdrew, dick sliding deliciously all the way to his tip before thrusting back in, rocking Katsuki into the mattress. Their mouths met in a savage kiss, teeth clattering as he immediately set a frantic pace.

Izuku’s lips moved restlessly over Katsuki’s skin, his kisses threaded with desperation as his body pressed into Katsuki’s, skin meeting skin, carnal and sweaty and god Katsuki loved him. He moaned as Izuku gripped his hair and tugged even as his hips drove into him, the bed rocking beneath them with every deep thrust.

Katsuki growled incoherently, “...faster, faster, harder, c’mon, Izuku, fucking fuck, please, please, I want feel you in my throat, this all you got? Oh shit, oh shit, I’m not gonna last.”

“It’s okay,” Izuku panted against his neck, licking up the taste of his sweat. “Come for me, Kacchan. I’ll make you come again. As many times as you want.”

“Izuku,” he shouted, his eyes squeezed tight as he threw his head back. His spine arched, his balls tightened, and his body clenched down as tremors rocked through him. Hot spend spilled onto his stomach as Izuku held him through his orgasm, thighs trembling and body jerking.

“You’re so beautiful, Kacchan,” Izuku murmured between sweet kisses to his jaw, his temple, behind his ear. “So amazing.”

“Uggh,” was all Katsuki could manage. He was exhausted, and he hadn’t even done anything. Was this what happened after abstaining from sex for two weeks? He was never letting this happen again.

Then Izuku shifted, drawing his attention to the fact he was still inside him and still very much hard. Katsuki made a small, experimental roll of his hips. Pleasure skittered up his spine, and Izuku groaned before he hoisted up Katsuki’s thighs and began fucking him again in earnest.

Somewhere on the other side of the wall separating their rooms, he heard a faint, “Oh my god, they're not done.”

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One chapter left lol