Katsuki threw off his shirt first. His hands went to the button of his jeans. His eyes never left Izuku’s. The sound of the zipper was obscenely loud in the tent’s heat.

“Look at me,” Katsuki said, his voice a low rasp. He shoved the jeans down his hips, kicked them away. He stood there, fully naked, the firelight from the lantern painting the hard planes of his chest, the dusting of blond hair trailing down his stomach.

Izuku’s breath hitched. His gaze dropped, dragged down by a gravity he couldn’t fight. His father was huge. Thick and heavy, uncut, already leaking a clear bead of wetness from the tip. It was a brutal, beautiful fact. Izuku’s mouth watered instantly, an ache blooming under his tongue.

“You see it?” Katsuki asked.

Izuku could only nod, his throat too tight for words.

“Say it.”

“I see you,” Izuku whispered, the words trembling out.

Katsuki moved closer. The heat of him radiated against Izuku’s skin. He cupped the back of Izuku’s head, his callused palm a firm, undeniable pressure. Not yanking. Claiming. “You want it?”

“Yes.”

“Where?”

Izuku’s lips parted on a shaky exhale. “In my mouth.”

Katsuki guided him forward. The blunt, slick head of his cock pressed against Izuku’s lips. The taste hit him first—salt, musk, something clean and sharp and purely *Katsuki*. It flooded Izuku’s senses. He opened wider.

The first inch was a stretch. A filling, impossible heat that made his spent cunt clench in a sympathetic, empty pulse deep inside him. He moaned around the intrusion, the vibration pulling a ragged gasp from his father.

Izuku looked up. Katsuki’s face was shattered. All that rigid control was gone, erased by raw, stunned awe as he watched his son’s mouth take him in. His red eyes were wide, vulnerable, his lips parted on silent, ragged breaths.

“Fuck,” Katsuki breathed, the word barely sound.

Izuku sank deeper, letting the weight rest on his tongue, learning the shape of him. He tasted more of that pre-come, licked at the slit experimentally. Katsuki’s hand tightened in his curls.

“Slow,” Katsuki commanded, but his voice was frayed. “Just… just get used to it.”

Izuku obeyed, taking him deeper by increments, feeling the stretch in his jaw. He hollowed his cheeks and sucked gently.

A full-body shudder wracked Katsuki. His hips jerked forward a fraction before he stilled them with a visible effort. “Christ,” he gritted out. “Your mouth…”

Izuku pulled back until just the head rested on his tongue and looked up again, questioning.

The awe was gone, replaced by a dark, desperate hunger. “Don’t stop,” Katsuki said. “Don’t you dare fucking stop.”

Izuku pulled off completely, his lips wet and swollen. He looked up, his green eyes huge in the lantern light. "Daddy," he whispered, the word a hot, broken breath against the slick head of Katsuki's cock.

Katsuki's control snapped. A raw, guttural sound tore from his throat. His hand fisted in Izuku's curls, not guiding now, but holding him there, captive to the word. "Again."

"Daddy," Izuku gasped, and dove back down, taking him deep in one smooth, desperate slide.

Katsuki's hips jerked. "Fuck—easy," he choked out, but his body was arching into the heat of Izuku's mouth. His other hand came up to brace against the tent pole, the nylon wall groaning with the shift of his weight. "Just like that. Christ, just like that."

Izuku moaned around him, the vibration shooting straight up Katsuki's spine. He worked his tongue along the thick vein underneath, licking up the steady leak of pre-come, savoring the salty, musky taste that was now layered on his own from earlier. His jaw ached beautifully.

"You're so good at this," Katsuki rasped, his voice shredded. "Where'd you learn to suck cock like this?"

Izuku pulled back to the tip, panting. "Didn't," he said, his words slurred with spit and want. "Just want you." He swirled his tongue around the crown.

"Bullshit." Katsuki's thumb stroked over Izuku's fever-hot cheek. "Tell me the truth."

"It *is* the truth," Izuku insisted, nuzzling into the heavy weight against his lips. "Thought about it. For years. How you'd taste." He took him back in slowly, sinking until his nose pressed into blond curls.

Katsuki watched, mesmerized, as his son's throat worked to accommodate him. The sight alone was nearly enough to finish him. The tight, wet heat, the absolute surrender in Izuku's upturned eyes—it was obliterating. "Years?" he managed.

Izuku nodded as best he could, a slight movement that made Katsuki groan. He pulled off again with a wet pop. "Since I was fifteen," he confessed, breathless. "Maybe fourteen. When you'd come home from work and shower… I'd listen."

"You little pervert," Katsuki breathed, but there was no heat in it, only awe and a dark, swelling pride.

"Yeah," Izuku agreed shamelessly, and licked a broad stripe from base to tip before swallowing him down again.

Katsuki’s head fell back against the tent pole. The pleasure was a live wire under his skin, coiling tight in his gut. He could feel his own end approaching, a tidal wave building just offshore. "Izuku… I'm close."

Izuku’s response was to suck harder, hollowing his cheeks, one hand coming up to cradle the heavy weight of Katsuki’s balls.

"Stop," Katsuki gritted out, tugging at his hair. "I said I'm close."

Izuku released him with a gasp, lips slick and parted. "Don't want you to stop."

Katsuki’s control finally snapped. A low, guttural sound ripped from his chest as he pushed Izuku back onto the rumpled sleeping bags. He didn’t ask. He followed him down, his knees bracketing Izuku’s hips, his huge, leaking cock bobbing against Izuku’s stomach.

“Open,” Katsuki commanded, his voice a ragged scrape.

Izuku’s mouth fell open instantly, his green eyes wide and fixed on his father’s face. Katsuki guided himself back to those wet, parted lips. This time, he didn’t pause. He pushed forward, filling that hot mouth in one relentless, deep thrust.

Izuku gagged, his body jerking, but his hands came up to clutch at Katsuki’s thighs, holding on. Tears sprang to his eyes from the stretch.

“Breathe through your nose,” Katsuki gritted out, his own breath coming in harsh pants. He pulled back until just the head remained, glistening with spit. “You wanted it. Take it.”

He pushed back in, slower this time, letting Izuku’s throat work around him. The wet, tight heat was maddening. Izuku moaned around him, the vibration shooting straight to Katsuki’s core.

“Look at me,” Katsuki demanded.

Izuku’s tear-filled eyes rolled up to meet his. The absolute surrender in them—the trust mixed with raw want—unmade something in Katsuki’s chest.

He set a rhythm then, deep and punishingly slow. Each thrust fed more of his length into that willing heat. The wet sounds of it filled the tent, obscene and intimate. Pre-come and spit slicked Izuku’s chin.

“Chock on me,” Katsuki rasped, watching the mess he was making. “Take my cock.”

Izuku’s answer was a choked moan, his fingers digging into the hard muscle of Katsuki’s legs. His own hips rocked up into empty air, his cunt clenching around nothing.

Katsuki could feel his own end coiling tight, a pressure building at the base of his spine. The sight was too much—his son beneath him, taking him so deep, so beautifully wrecked. He drove in harder, losing the rhythm for a few frantic thrusts.

“Gonna cum,” he warned, the words torn from him. “Where do you want your Daddy’s cum?”

"Swallow it," Izuku gasped, his voice wrecked from the stretch of Katsuki's cock. His hands slid from Katsuki's thighs to his hips, trying to pull him deeper. "Please, Daddy. I want to taste you."

Katsuki shuddered, his whole body tensing. He pulled all the way out, his cock slipping from Izuku's lips with a wet sound that echoed in the hot tent. Pre-come glistened on Izuku's chin, his mouth still open and waiting.

"No," Katsuki said, the word rough. He sat back on his heels, his own need a visible, throbbing ache between them. "You don't get to decide."

"But—"

"You beg for it." Katsuki’s red eyes were dark, pupils blown wide. A single drop of cum beaded at his tip. "You tell me why you deserve it."

Izuku whined, high and desperate in his throat. His hips rolled up again, his cunt clenching visibly. "I deserve it because I'm yours," he pleaded, the words tumbling out. "I took it. I took all of you. I want everything you give me."

Katsuki’s hand wrapped around the base of his cock, stroking slowly. He watched Izuku watch him do it. "Not good enough."

"Daddy," Izuku sobbed, tears tracking through the mess on his face. He spread his legs wider on the sleeping bag, a silent offering. "I've wanted this since I was a kid. I've been empty my whole life waiting for you to fill me up. Please."

The raw confession punched the air from Katsuki’s lungs. His control, already in tatters, frayed completely at the edges.

Katsuki’s hand fisted in Izuku’s curls. He shoved his cock back into that wet, waiting mouth without warning, a brutal, deep thrust that made Izuku’s body jolt.

Izuku gagged, his throat convulsing around the sudden intrusion. Tears welled instantly, blurring his vision of Katsuki’s shattered expression above him.

“You want to be filled?” Katsuki growled, his hips snapping forward again, burying himself to the hilt. The thick head nudged the back of Izuku’s throat. “Then take it. Swallow around me.”

Izuku moaned, a broken, wet sound. He forced himself to relax his jaw, to breathe sharply through his nose as his father had taught him. The taste of salt and musk and pure *Katsuki* flooded his senses. He could feel every vein, every pulse of that heavy cock on his tongue.

“Good,” Katsuki rasped, his voice wrecked. He began to move, short, punishing thrusts that stole the air from Izuku’s lungs. “Look at me.”

Izuku’s tear-filled eyes rolled up. Katsuki was watching him with a raw hunger that bordered on violence, his own breath coming in ragged pants. A strand of saliva dripped from Izuku’s lip onto his own chest.

“You feel that?” Katsuki demanded, grinding deep, making Izuku choke again. “That’s me. That’s your Daddy. Right down your fucking throat.”

“Mmf–Daddy,” Izuku managed around the fullness, the vibration earning a sharp groan from above.

Katsuki’s rhythm faltered. His control was a thin wire, fraying with each wet slide. “Gonna cum,” he warned again, the words gritted out between clenched teeth. “You still want it? You want me to paint your pretty throat?”

Izuku nodded desperately, his hands scrambling to grip Katsuki’s hips, trying to pull him even deeper. His own cunt was dripping, a slick ache throbbing in time with each thrust into his mouth.

“Then beg for it,” Katsuki ordered, slowing to a torturous grind. “Beg for your Daddy’s cum.”

Izuku whined as Katsuki pulled almost all the way out, leaving just the tip resting on his swollen lower lip. “Please,” he gasped, chest heaving. “Please cum in my mouth. I need it. I need to taste you.”

“Why?”

“Because I’m yours!” Izuku cried out, the confession raw and loud in the confined space. “All I am is yours. Let me have it.”

That was it. The last thread snapped.

Katsuki drove forward with a final, deep snarl, one hand cradling the back of Izuku’s head as he buried himself completely. His hips stuttered once, twice.

Izuku felt the first hot pulse against the back of his tongue.

Katsuki held Izuku’s head still, his fingers a tight cage in the green curls, as he emptied himself completely. The hot pulses were deep and rhythmic, flooding Izuku’s mouth with a bitter, salty warmth that was purely, undeniably his father.

Izuku swallowed convulsively, his throat working around the thick intrusion. Each gulp pulled another ragged groan from Katsuki’s chest.

When the last shudder passed through him, Katsuki didn’t pull away. He stayed buried, his softening cock resting heavy on Izuku’s tongue, his breath coming in harsh gusts. He looked down, his red eyes wide and almost lost.

“You took it all,” Katsuki said, his voice scraped raw. It wasn’t a question.

Izuku could only nod, the movement slight against Katsuki’s grip. The taste lingered, coating his mouth and throat. He’d never tasted anything so intimate.

Slowly, Katsuki withdrew. The slide was wet and obscene. He released Izuku’s hair, his hand trembling slightly as it fell to his own thigh.

Izuku gasped for air, a string of saliva and cum connecting his lips to Katsuki’s spent cock for a second before it broke. He wiped his mouth with the back of his hand, his eyes never leaving his father’s face.

“Was it…” Izuku started, then swallowed again, his voice hoarse. “Was it good?”

A sharp, broken sound escaped Katsuki—not quite a laugh. “Look at me.”

Izuku was looking. He saw the sweat sheening Katsuki’s chest, the wild disbelief in his eyes, the complete absence of the control that usually armored him.

“It shouldn’t be,” Katsuki said quietly. He reached out, his thumb smearing the wetness from Izuku’s chin. He brought his thumb to his own mouth and sucked it clean, never breaking eye contact. “Nothing about this should be good.”

“But it is,” Izuku whispered.

Katsuki didn’t deny it. He just stared at the boy beneath him—his son, lips swollen, face flushed and tear-streaked, body splayed open and wanting on the sleeping bag.