The smell of old pine and woodsmoke was thick in the cabin air, but now it was undercut by the warm, honeyed scent of burning wax. Izuku had lit every candle he could find, their flames casting a trembling, golden light that made the shadows on the log walls dance. He stood in the center of that flickering glow, having just changed, the cool air raising goosebumps on his freckled skin. The lingerie was green lace, a harness-like top that cupped his tiny tits and made his puffy, dark pink nipples stand taut against the pattern. The panties were a joke—just a band of lace around his hips, the center utterly gone, leaving his smooth, hairless pussy completely exposed to the chill. He took a deep breath, let it out slowly, and laid himself back on the narrow bed, arranging his green curls against the pillow, and waited.

He didn’t have to wait long. The heavy tread on the wooden porch steps was unmistakable. The door opened, bringing in a rush of cooler night air that made the candle flames gutter. Katsuki stood frozen in the doorway.

He’d changed into a soft grey t-shirt and black sweats, clothes for moving, for comfort. Nothing in his life had prepared him for the vision on the bed. The breath left his lungs in a silent, punched-out rush. Every candle flame seemed to be reflected in Izuku’s wide, green eyes, which were fixed on him with a devious, knowing smile.

Slowly, without breaking that gaze, Izuku bent his knees. He planted his feet on the mattress and let his thighs fall open in a deliberate, obscene display. The lace framing his hips did nothing to hide the glistening, swollen flesh between his legs. The candlelight shone on the wetness already gathered there.

“Daddy,” Izuku breathed, the word a sultry taunt. “You came.”

Katsuki’s mouth was dry. He finally stepped inside, letting the door shut behind him with a soft click. The world outside ceased to exist. There was only this room, this heat, this boy on the bed. His boy. His eyes traveled from the defiant smile down the slender throat, over the lace straining against small breasts, down the flat stomach, to the devastating open invitation between his thighs. He saw the freckles scattered like constellations across the inner skin.

“What the hell are you wearing?” Katsuki’s voice was a low, gravelly rasp.

“Something for you,” Izuku said, his smile widening. He hooked his fingers under his thighs, pulling them open even wider, making the offering impossible to ignore. “I’ve been waiting. All day. Thinking about your promise.”

Katsuki took another step, his own body reacting violently. His cock, heavy and thick, was already straining against the soft fabric of his sweats, a blatant outline. He stopped at the foot of the bed, looking down at his son. The raw hunger warred with a deeper, colder shock. This was a level of deliberate seduction he still wasn’t fully accustomed to.

Izuku’s smile softened, turning earnest, vulnerable. “Please,” he whispered, and the playfulness bled away, leaving pure, naked want. “Please, fuck my virgin cunt, Daddy.”

The word hit Katsuki like a physical blow. “Virgin.”

He hadn’t moved. He couldn’t. The air in the cabin seemed to solidify. All the heat, the lust, the possessive fury coalesced into a single, stunning point of clarity. His eyes snapped back to Izuku’s face, searching for the lie.

“We can’t,” Katsuki said, the words torn from somewhere deep and ragged. His hands, which had been hanging at his sides, clenched into white-knuckled fists. “Your first time… it shouldn’t be this. It can’t be me.”

Izuku’s vulnerable smile vanished. “Why not?”

“Because I’m your fucking father!” Katsuki’s voice rose, raw with a frustration that wasn’t anger. He dragged a hand through his spiky hair. “Your first time should be with some… some stupid boy your own age. Not a fucking incestuous act with the man who changed your diapers.”

“I don’t want some stupid boy,” Izuku said, his own voice hardening. He didn’t close his legs. He held himself open, a defiant offering. “I’ve never wanted anyone else. I saved it. For you. On purpose.”

Katsuki stared at the glistening proof between Izuku’s thighs. His cock throbbed, a painful, demanding pulse against his sweatpants. The outline was obscene. He wanted to fall on him, to bury himself in that untouched heat and claim it forever. The possessive urge was a physical ache in his teeth.

“You don’t know what you’re saying, Izuku.”

“I’m eighteen. I know exactly what I’m saying.” Izuku pushed himself up on his elbows, the lace digging into his pale skin. “You think I didn’t know what I was doing when I put on that uniform? When I stretched for you on that field? I wanted your eyes on me. Only yours. I’ve *always* wanted it.”

Katsuki took a single, jerky step forward. The bed frame pressed against his thighs. He could feel the heat coming off Izuku’s body. “It’s wrong.”

“Then why are you here?” Izuku challenged, his green eyes fierce. “Why did you promise to come? Why did you make me wait all day, aching for you, if you were just going to say it’s wrong?”

“Because I’m a selfish, fucking monster,” Katsuki growled, the confession ripped out of him. He reached out, his fingers hovering just above the inside of Izuku’s knee. He didn’t touch. “And you’re my kid. My brilliant, perfect kid. I should be protecting you from men like me.”

Izuku’s breath hitched. He shifted, pressing his knee up into the ghost of his father’s touch. “Protect me by giving me what I need. Please, Daddy. I need you to ruin me. I want it to be you.”

“Fuck it,” Katsuki snarled, the words a surrender and a command all at once.

He yanked the soft grey t-shirt over his head in one rough motion, the muscles in his chest and arms cording with the action. His sweats and briefs followed, kicked aside, and then he was naked, his massive, uncut cock jutting thick and angry from the thatch of blonde hair, the heavy weight of his balls beneath it. The candlelight glowed over the hard planes of his abdomen, the powerful thighs. He didn’t hesitate. He crawled onto the bed, the old frame groaning under his weight, and came over Izuku, caging him with his arms.

He crashed their mouths together.

It wasn’t gentle. It was a claiming. The first kiss. Izuku gasped into it, his lips parting instantly, and Katsuki licked inside, tasting him—mint and something uniquely, addictively Izuku. His tongue was demanding, mapping the roof of his mouth, sliding against his own. Izuku’s hands flew up, tangling in his father’s spiky hair, holding on like he was drowning. Katsuki kissed him until they were both breathless, until Izuku was whimpering, his hips arching up off the mattress seeking friction.

Katsuki broke the kiss, panting, his forehead resting against Izuku’s. “Look at me,” he ordered, his voice a low, wrecked rumble.

Izuku’s green eyes were hazy, his lips swollen and wet. He stared up, utterly captured.

“We’re gonna do this right,” Katsuki said, each word deliberate. “Your first time. I’m gonna make it feel good. You understand me? You tell me if it hurts.”

“It won’t—” Izuku started, but Katsuki cut him off with another hard, sucking kiss to his mouth.

“You’ll tell me,” Katsuki repeated against his lips. He shifted his weight, settling more fully between Izuku’s spread thighs. The heat of their bodies met. The thick head of his cock, slick with his own pre-cum, nudged against Izuku’s swollen folds. Izuku cried out, a sharp, broken sound.

“Daddy…”

“I know,” Katsuki murmured. He reached between them, his big, calloused hand wrapping around his own length. He guided himself, rubbing the broad head through the soaked slit, coating himself in Izuku’s wetness. He pressed, just once, at the tight, fluttering entrance. “You’re so fucking wet for me. So ready.”

“Please,” Izuku begged, his back arching, his small tits straining against the green lace. His puffy nipples were hard peaks. “Please, I need it. I need you inside.”

“Shhh,” Katsuki breathed against his mouth, silencing the plea. He kissed him again, deep and consuming, his tongue stroking Izuku’s as he shifted his hips. The thick, hot length of his cock dragged through drenched folds, a slow, slick friction that made Izuku sob into the kiss. The broad head caught and rubbed over his swollen clit, a deliberate, circling tease.

He broke the kiss, panting. “We’re not rushing this.” His voice was a rough scrape of control. “My monster dick will tear your precious cunt apart if we rush. You feel how big it is?” He rocked forward again, the heavy weight of him pressing against Izuku’s entrance without pushing in.

Izuku nodded frantically, his nails digging into Katsuki’s shoulders. “I feel it. Daddy, I feel it, please—”

“Tell me what you feel.”

“Heat,” Izuku gasped. “Pressure. You’re so… thick. I’m so full and you’re not even inside.”

“Good.” Katsuki kissed him, slower this time, a damp, open-mouthed slide. He kept rocking, a slow, tortuous rhythm that coated his shaft in Izuku’s wetness, that made the head nudge and retreat, nudge and retreat. The sound was obscene—a wet, sticky slide each time he moved. “Gotta get you used to me. Gotta open you up slow.”

“I’m ready,” Izuku whimpered, his hips trying to chase the pressure. “I’m so ready, I need it.”

“You’re tight as a fucking fist,” Katsuki growled, but there was awe in it. He paused, the crown of his cock pressed firmly at the clenching entrance. His whole body was trembling with the effort of holding back. “Look at me, Izuku.”

Izuku’s eyes fluttered open. They were glazed, desperate.

“Breathe out,” Katsuki commanded softly. “And when you breathe out, I’m gonna give you the first inch. Just the first. You take it for me.”

Izuku nodded, a quick, jerky motion. He sucked in a ragged breath, then let it shudder out.

Katsuki pushed.

The stretch was immediate, shocking. Izuku cried out, a sharp, wordless sound of protest and overwhelm. His body clenched, a fierce, involuntary resistance around the invading thickness.

“Breathe,” Katsuki ordered, his own voice strained. He’d stopped, buried just past the head, the sensation of impossible tightness and searing heat making his vision swim. “Just breathe, baby. Let your body get used to me.”

“It hurts,” Izuku gasped, tears welling in his eyes. “Daddy, it hurts.”

“I know.” Katsuki lowered his head, kissing the tears from Izuku’s cheeks. His voice was softer than Izuku had ever heard it. “It’s supposed to hurt a little. The first time. But I’ve got you. You’re doing so good. So perfect for me.” He didn’t move, just let the incredible, clutching heat of his son’s body adjust to the intrusion. “You feel how wet you are? How you’re sucking me in?”

Izuku nodded again, a sob catching in his throat. The burning stretch was already shifting, melting into a deep, unfamiliar fullness. “Don’t stop,” he whispered.

“Wasn’t planning on it.” Katsuki kissed his mouth, a brief, reassuring touch. Then he pulled back—just a fraction, a slow withdrawal that made Izuku moan—and pushed forward again, sinking another inch.

This time, the sound Izuku made was different. Less pain, more shock. A broken, guttural “oh” that vibrated through both of them.

“There you go,” Katsuki murmured, his forehead damp with sweat. He was shaking with the effort of his control, every muscle corded. “Taking me so good. My good boy.” He rocked again, another incremental, devastating advance. He was halfway in now, the stretch profound, the sensation of being split open utterly complete. “Tell me.”

“So full,” Izuku choked out, his head thrown back against the pillow. “You’re everywhere. I can feel you… in my stomach.”

“You are.” Katsuki’s hips pressed forward, another relentless, patient inch. The burn was fading, replaced by a deep, radiating ache of fullness. Izuku’s cunt was fluttering around him, a desperate, rhythmic clutch. “You feel that? Your little cunt’s learning me. It’s holding on like it’ll never let go.”

He bottomed out.

Izuku screamed.

It was a short, punched-out sound, followed by a ragged gasp. He was utterly impaled, filled to the limit, Katsuki’s hips flush against his ass, their bodies locked together. There was no more space. Katsuki was buried inside him, his massive cock sheathed completely in virgin heat.

For a long moment, neither of them moved. The only sounds were their shattered breathing and the pop of candle wax. Katsuki looked down at where they were joined, at the obscene, beautiful sight of his thickness disappearing into his son’s small, trembling body. A possessive awe, darker and more profound than anything he’d ever felt, settled in his bones.

“Mine,” he breathed, the word a vow. He leaned down, his mouth beside Izuku’s ear. “You’re mine now, Izuku. Every part of you. This cunt is mine.”

Izuku could only whimper, overwhelmed by the reality of it. He was full of his father. Finally.

“Look,” Katsuki growled, his voice raw with strain. He fisted a hand in Izuku’s green curls and wrenched his head down, forcing his gaze to their joined bodies. “Look at what you did. Look at what you took.”

Izuku’s breath hitched. Beneath the flat plane of his stomach, a subtle, obscene bulge distended his skin with each shallow thrust Katsuki made. The outline of his father’s cock was inside him, stretching him from within. “Oh, god,” he whispered.

“That’s me,” Katsuki snarled, his hips snapping forward, driving the bulge deeper. “That’s your daddy’s monster cock ruining your little belly. You feel that?”

“Yes—fuck, yes, I feel it—”

“Then take it.”

Control shattered. The patient, careful rhythm dissolved into something brutal and starving. Katsuki pulled out until just the head remained, then slammed back in, a wet, punishing drive that shoved Izuku up the bed. The sound was filthy—a thick, meaty slap of skin, a gush of wetness.

Izuku screamed, his back arching off the mattress. “Daddy!”

“That’s it,” Katsuki chanted, his own voice breaking as he set a ruthless, piston-like pace. “That’s my boy. Taking his daddy’s dick like a born slut. This cunt was made for me.”

“It was—it was, only for you—ah!—only ever for you—” Izuku babbled, his words fracturing into gasps. Each thrust punched the air from his lungs, each withdrawal a dizzying emptiness. His puffy nipples rubbed raw against the lace of his lingerie, a sharp counterpoint to the deep, splitting fullness below.

Katsuki leaned over him, one hand braced by Izuku’s head, the other gripping his hip hard enough to bruise. Sweat dripped from his chin onto Izuku’s chest. “You gonna come on my cock? Gonna squirt all over it like the little fountain you are?”

“I can’t—it’s too much—”

“You can. You will. I’m gonna feel that virgin cunt milk me dry.” He shifted his angle, driving deeper, and Izuku saw stars. A ragged, sobbing moan tore from his throat. “There. Right there, isn’t it? That’s the spot that ruins you.”

“Daddy, Daddy, please, I’m gonna—it’s gonna—” Izuku’s hands scrambled over Katsuki’s back, nails raking down the sweat-slick muscle. He was incoherent, his world narrowed to the brutal friction, the overwhelming stretch, the primal claim of his father’s body owning his.

“Do it,” Katsuki commanded, his own rhythm faltering, his thrusts becoming jagged, desperate. “Soak me. Let me feel it.”

The climax detonated. It wasn’t a wave; it was a seizure. Izuku’s body bowed, a silent scream on his lips as his cunt clenched in a violent, rhythmic spasm around the massive intrusion. A hot gush of fluid erupted between them, a soaking rush that made the already slippery fuck even messier, the sounds turning into obscene, wet squelches.

The sensation of Izuku squirting around him, the frantic, milking tightness, broke Katsuki completely. A raw, guttural roar was torn from his chest as he buried himself to the hilt and came. His orgasm was a torrent, pulse after hot pulse flooding Izuku’s depths, claiming, filling, marking the virgin space as irrevocably his.

He collapsed forward, catching his weight on trembling arms, his forehead pressed to Izuku’s. Their panting breaths mingled, loud in the sudden quiet. The candles flickered wildly, casting dancing shadows over their wrecked, joined bodies.

“Mine,” Katsuki breathed again, the word a spent, hoarse echo against Izuku’s lips. His cock, still mostly hard, twitched inside the clenching, oversensitive heat.

Izuku whimpered, a full-body shudder wracking through him. He was ruined, stuffed, dripping. He’d never felt more complete. “Yours,” he whispered back. “Always.”

Katsuki’s weight was a solid, suffocating warmth. Izuku didn’t mind. He wrapped his shaking arms around his father’s sweat-slick shoulders and held on, his face buried in the crook of Katsuki’s neck. The smell of sex and salt and his daddy filled his lungs.

“Can’t move,” Katsuki grunted, his voice a wrecked rumble against Izuku’s ear.

“Don’t.” Izuku’s whisper was hoarse. He clenched around the softening thickness still inside him, and Katsuki jolted with a low groan.

“Fuck. Don’t do that.” But he didn’t pull away. He stayed there, impaling Izuku on his spent cock, for another full minute. Finally, with a reluctant exhale, he shifted his weight and slipped out.

The sensation was obscene. A hot, wet rush followed the loss, painting Izuku’s inner thighs. He gasped, his hips twitching.

Katsuki looked down between them, his red eyes dark. “Made a mess of you.” His thumb swiped through the mingled fluids on Izuku’s stomach, then brought it to his own mouth. He tasted it, his gaze locked on Izuku’s. “Mine.”

“Yours,” Izuku repeated, his body humming with the echo of the claim.

“This shit has to go,” Katsuki muttered, his fingers finding the clasp of the lingerie bra. His movements were slow, clumsy with exhaustion, but deliberate. He unhooked it and peeled the damp lace from Izuku’s chest.

Izuku lifted his hips obediently as Katsuki tugged the ruined, crotchless panties down his legs and tossed them into the shadows. The cool cabin air kissed his feverish skin, raising goosebumps. He was completely bare now, exposed and used and utterly content.

Katsuki pulled the rough wool blanket from the foot of the bed and shook it out over them both before gathering Izuku against him.

Izuku went willingly, curling into the furnace of his father’s body. His back fit against Katsuki’s chest, Katsuki’s heavy arm draping over his waist, a big hand splayed possessively over his stomach. The evidence of their joining was slick between Izuku’s thighs, a sticky reminder he never wanted to fade.

Silence settled, thick and comfortable. Katsuki’s breathing evened out behind him, his heartbeat a steady drum against Izuku’s spine. Just as Izuku was tipping over the edge into sleep, Katsuki’s voice came, quiet and rough.

“Why’d you save it?”

Izuku didn’t need to ask what he meant. He nuzzled deeper into the pillow. “Told you. Was only ever for you.”

“Bullshit. You’re eighteen. Good-looking. Could’ve had anyone.”

“Didn’t want anyone.” Izuku opened his eyes, staring at the dancing shadow on the log wall. “Wanted it to hurt. Wanted it to be… a big deal. Something I couldn’t forget.” He paused. “Wanted you to be the one who ruined me.”

Katsuki’s arm tightened around him. His next words were so quiet Izuku almost missed them. “I did, didn’t I?”

“Yeah, Daddy.” Izuku reached back, his fingers finding and tangling with Katsuki’s where they rested on his belly. “You really did.”

One of the candles died with a final hiss. In the deepening dark, Katsuki pressed a kiss to the crown of Izuku’s head. “Go to sleep, nerd.”

And for the first time, wrapped in the proof of his father’s possession, Izuku did.