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Strewn across his lap, wearing nothing but a loose, worn grey t-shirt, black boxers, and dark grey ankle socks, Katsuki wriggled his hips until the crook of where his abdomen met his pelvis was perfectly slotted on Izuku’s thigh.
“Uhm, Kacchan…are you sure this is what you want?” He asked, hands hovering above the man beneath him, unsure of where to place them.
“Fuck yeah, hit me.”
His brazenness never failed to make Izuku flush bright red, “K-Kacchan!” He yelped, covering his face.
“You've done it before."
”I-it just feels…really…f-freaky…to do it like this.”
Katsuki chuckled, angling back to grab the other man’s tie, pulling him forward for a deep kiss, taking a moment to breathe him in as their lips locked. “You like it,” he drew away, smirking, and settled back into his original position: draped over Izuku’s legs, palms flat and face down on the couch, ankles vaguely crossed as they dangled up in the air, “Now get to work.”
“Get to work…” Izuku parroted, in his post-kiss daze, letting his hands slip under the soft cotton of Katsuki’s t-shirt to rove up and down his back, alternating between gentle rubs splaying over every inch of smooth and scarred skin, fingertips pressing into the taut muscle of his shoulders, nails dragging up his spine, stopping just above the line of his boxers to coax out delicate, contented sighs. Katsuki melted into the touch, nestling into the couch cushion, and with a wide, loving stroke up his back, Izuku’s right hand found itself cradling his neck, breaching over the collar of his shirt to grip the fine hair at the back of his head. He gave a gentle tug and pulled back, leaning down to whisper in the blonde's ear, “You want this?”
“Yesssss,” Katsuki hissed, his insides fluttering with anticipation.
“Mkay, for Kacchan,” he smiled, taking the opportunity to nip at his earlobe, before placing a series of apologetic kisses to the pulse point of sensitive skin behind it, relishing in the soft, keening sighs it so easily elicited from the otherwise stern, stoic-but-operating-on-a-hair-trigger, pro-hero. He sucked, gently, not hard enough to leave a lasting mark, but enough to earn a shiver from the other man, enough to draw fleeting color to the pallid surface before smoothing it away with a final swipe of his tongue.
He released his grip on Katsuki's hair and let his hand travel back down to the arch of his back, once again lingering to gently massage the rigid muscles on each side of his spine; this time reaching a bit lower to slip under the elastic line of his boxers and feel the heated skin there. Katsuki twitched under the conservative touches, but Izuku quickly drew his hand away, letting the elastic snap back ever so slightly.
“M‘not too sure what to do,” he murmured, half in genuine admission, the other half goading Katsuki for more of his shameless instructions.
“Need me to teach you, sensei?” He teased, chuckling at the strangled noise Izuku made in response.
“Kacchan…” He lamented.
“You know what to do,” Katsuki predicated, breath catching in his throat when he felt a large, warm hand graze over the full curve of his ass and begin stroking up and down, the drag of thin fabric intensifying each touch, sending waves of heat through his stomach.
Izuku hooked his fingers to slowly pull back the line of his boxers, and Katsuki shifted his hips to allow easier access, letting him slide them all the way down to his knees, exposing soft, creamy pale skin, unable to conceal his eagerness with the way he canted his ass up, silently begging for more contact. Izuku quickly granted his soundless wish, rough hands continuing their exploration, fingers circling and dipping around each cheek to spread, knead, and rub the tender flesh. “So pretty…”
Katsuki groaned, his breath coming out short and labored already, bucking rhythmically into Izuku’s caresses, shamelessly allowing himself to be fondled.
“I don’t wanna hurt you,” Izuku pouted slightly, giving him a series of harsher, firmer squeezes anyway. Blood rushed to Katsuki’s cock in response, already nearing full hardness before the real fun had started.
“Mm, a nerd like you can’t hurt me,” he teased. “C’mon baby, hit me.” He was trying not to sound desperate, trying to forgive Izuku’s hesitation, since it was a bit of a deviation from their usual routine…But he knew how to rile Izuku up, knew exactly what buttons to press to goad him into a challenge; knew how to spark a fire only he could take without getting burned. “Think I can’t handle it? Deku,” he taunted, provocation dripping from his voice.
Izuku brought his palm down for an experimental Smack!
“I know you can,” he muttered, marveling at how Katsuki’s body tensed, lurching forward as if he hadn’t been expecting it, before relaxing into submission. He smoothed his tingling palm over the spot.
“Mmm,” Katsuki hummed, delighted. “Harder.”
He gasped upon being rewarded with a much, much more solid slap to the plumpest part of his ass, and he jolted, fingers curling into tight fists as the sharp sting of the hit immediately melted into a smoldering pleasure, pulsing between his legs. Another SMACK! forced out a delicious cry, “Ah!” he squeezed his thighs together.
Izuku spanked him again, seizing a handful of hot flesh as he made contact, eliciting another twining moan,
then again,
harder, again,
pausing, to gauge Katsuki’s reaction, then once more on each side, watching how the delicate flesh rippled under the force of his palm, mouth falling slightly open upon seeing how Kacchan responded to each blow, jerking and whimpering in strained contentment, his features contorting in what could only be described as ecstasy.
SMACK!
“Oh, shit,” he gasped, “Fu-uck, hah—“ he rolled against Izuku's thigh, now painfully hard, cock throbbing uselessly between his legs.
“Kacchan….,” he breathed out, slightly aghast, taking a moment to rub circles on the flustered skin, “You really like that…”
“Fuckin’, love your hands on me, Izuku,” his voice was rough, pitched up, already pleading, “Keep going.”
Any semblance of hesitation that was previously holding Izuku back was distant in his mind with Kacchan spurring him on, so he got to work this time, each slap of skin against skin sending a piercing crack reverberating through the room.
SMACK!
“Nng, ffuuck.”
SMACK!
“Oh— my god, mmph.”
SMACK!
SMACK!
SMACK!
Over and over again; Katsuki’s entire body kept tensing and untensing, grasping at the couch cushion, toes curling in his socks, thighs twitching and pressing tighter and tighter together, brows pinched up in biting pleasure.
Izuku’s eyes were blown wide in amazement at the way Katsuki thrashed and cried out with every sharp strike. He was still relenting though, left hand occasionally carding through his hair, smoothing the other offending palm over the swell of his perfect, round ass to soothe him through each sting.
SMACK!
Katsuki was trying his best to hold still, but Izuku could feel him squirming in his lap, humping his hard, leaking cock helplessly against his leg, uncharacteristically desperate moans spilling out of him every time he managed to make contact.
“You’re doing so good….Kacchan…” Izuku leaned down to whisper against the shell of his ear.
SMACK!
His body was steadily quaking now, chanting curses and dazed murmurs of approval as Izuku administered his harsh spanks, quickly morphing into a series of choked sobs, mumbled praises, and incoherent, bitten-off pleas until he was a whimpering, wet-eyed mess, grinding his aching hard length into Izuku’s thigh, smearing pre-cum all over his pant leg. His lips were parted and trembling, sweat beading on his forehead, and a fat tear rolled down his cheek. “F-fuck, b-baby,” Katsuki’s voice cracked, coming out impossibly soft and subdued.
Izuku paused at that, suddenly taking notice of how the previously unmarred porcelain of his behind was now glowing pink all over, blossoming into a deeper, richer red that spread all the way down to where his ass met his thighs. A crushing wave of fondness crashed through his chest, before swirling into a deep arousal that settled in his gut, watching how Kacchan twitched, panted, and moaned pitifully as he trailed his fingers with a featherlight touch over the sensitive, reddened skin, heat radiating from the surface and warming his palms where they settled. He was hit with a familiar realization that was no less overwhelming than it was the first time it crossed his mind.
Kacchan is beautiful.
“You okay, baby?” He cooed, “Was it too much?” He brought a hand up to quell Katsuki’s shaking shoulders, and then to his cheek to wipe away the tears that had fallen.
“Hnn, Uh-uh,” Katsuki smiled weakly, nuzzling into Izuku’s caress, eyes fluttering shut, laying feebly across his lap,
“Now fuck me."