Chapter 1: Locker Room Heat
Kyle Matsumoto’s knuckles were white where they gripped the edge of the sink. The chrome was cold, a stark contrast to the heat pulsing under his skin. He stared into the mirror, but the guy staring back wasn’t him. Not the him from three weeks ago. That guy had been swallowed whole.
The reflection showed a stranger. A god, some part of him whispered, a traitorous, thrilled whisper.
His shoulders were now a broad, sloping shelf of muscle, veined and defined even at rest. His pecs were thick slabs, and the etch of his abs looked like something carved from stone. A map of power. He turned slightly, watching the ludicrous fan of his latissimus dorsi spread and contract. His own back was a topography he was still learning. He flexed his bicep, and the orb of muscle swelled, hard as a cantaloupe, a dense knot of potential violence. It was insane. It was the most beautiful thing he’d ever seen.
From the weight room annex, a rhythmic groan of iron and a hissed curse cut through the humid locker room air. The team was changing, but more than that, they were becoming. The serum Doctor Carson had called a “targeted mitochondrial peptide complex” was doing its work. Locker doors slammed with new, careless force. The scent of chlorine was undercut by something sharper, more animal: pure testosterone sweat.
Kyle’s sweatpants felt tight. It wasn’t just his quads, which now strained the grey fabric. He was hard. Again. It was a constant, low-grade thrum since the changes started, a restless energy that had to go somewhere. He’d been taking care of it in the shower stalls, quick and frantic, but the relief never lasted. The need just pooled back, deeper, stranger.
The main door swung open, and Derek O’Shea walked in.
Kyle’s breath hitched.
Derek had always been built—a solid junior, a workhorse on the relay. Now, he was a monument. He had to turn slightly to get his shoulders through the doorway. His neck was a fused column leading to a jaw that could break stone. His dark hair was damp with sweat, his simple white tee stretched across a chest that made Kyle’s own look almost modest.
But it was Derek’s face that held Kyle. The familiar, usually easy-going features were drawn tight with a mixture of awe and something like fear. His eyes, a flat pale blue, found Kyle’s in the mirror.
“Jesus, Matsumoto,” Derek said, his voice a rougher version of its old self. “You look like you ate the old you.”
Kyle forced a laugh. It sounded strained. “Look who’s talking. You’re gonna need a new door.”
Derek didn’t smile. He walked to his locker, a few down from Kyle’s, moving with a careful, contained power. Like he was afraid to let it loose. He pulled his shirt over his head, and Kyle’s mouth went dry.
Derek’s back was a masterpiece of brutal architecture. Every muscle group was pronounced, separated by deep, shadowed grooves. As he reached up to stash his gear, the sheer mass of his deltoids and traps flexed in a silent, breathtaking wave.
A jolt, pure and electric, went straight to Kyle’s groin. His cock, already half-hard, swelled to a full, aching erection in seconds. It was a painful, urgent demand. His mind went blank, wiped clean by a want so specific it terrified him. He didn’t just want to look. He wanted to taste. To touch. To get on his knees right here on the damp tile and see if Derek tasted like salt and chlorine and power.
He turned away from the mirror, facing the lockers directly, pretending to fiddle with his combination. His sweatpants were tented obscenely. There was no hiding it.
“You feeling it?” Derek asked, his voice closer. Kyle could smell him now—sweat, yes, but also clean soap and something inherently Derek underneath. “The… extra juice?”
“Yeah,” Kyle managed, his voice thick. “It’s… a lot.”
“Tell me about it.” Derek leaned a shoulder against the lockers. Out of the corner of his eye, Kyle saw the sheer width of him, the casual drape of a towel over his shoulder. Then he saw the prominent bulge in Derek’s own grey sweats. It was massive, unmistakable, and Derek made no move to conceal it. He just looked down at it, then at Kyle’s, a weird, resigned understanding passing between them.
“It doesn’t go down,” Derek said quietly, almost clinically. “Not really. Carson said it might be a side effect. Hyper-stimulation of all tissue.”
Kyle’s heart hammered against his ribs. “Inconvenient.”
“That’s one word for it.” Derek ran a hand over his face. “I jerked off four times before practice. It didn’t matter. Feels like I’m running on a different fuel.”
The confession hung in the steamy air. It was the most intimate thing anyone had ever said to Kyle. His own need crescendoed, a pounding rhythm in his blood. He turned his head, meeting Derek’s eyes. The fear was still there, but underneath it, a curiosity. A reflection of Kyle’s own chaos.
“What does it want?” Kyle heard himself ask. The question wasn’t about biology.
Derek understood. His pale eyes dropped to Kyle’s mouth, then back up. He didn’t answer. He just breathed, the expansion of his chest a hypnotic event.
The decision wasn’t a thought. It was a gravitational pull. Kyle let the towel fall from his waist. He saw Derek’s eyes widen, tracking the movement, then locking onto the rigid, undeniable evidence of Kyle’s hunger. Kyle took one step, then another, closing the distance until the heat from Derek’s body was another layer on his skin.
He didn’t ask. He just slowly, giving Derek every second to stop him, sank to his knees.
The tile was cold and hard. The view from here was staggering. Derek’s clenched fists, the dense forest of hair on his lower abdomen leading down, the overwhelming shape beneath the soft cotton. Kyle looked up the long, powerful line of Derek’s body. Derek was staring down at him, his expression unreadable, his chest rising and falling too fast.
“Kyle,” he whispered. It wasn’t a no. It was a recognition.
That was all the permission he needed. Kyle hooked his fingers in the waistband of Derek’s sweats and pulled them down.
The sight stole the air from his lungs. He’d never seen another man like this, not outside of a screen. It was thick, ruddy, and stood pulsing with a life of its own, curving slightly upwards towards a stomach ridged with muscle. It was terrifying. It was perfect.
He didn’t hesitate. He leaned forward and took the head into his mouth, salt and pre-come and skin. A violent shiver went through Derek. A ragged, broken sound came from above. Derek’s hand came up, not to push him away, but to hover beside his head, trembling.
Kyle worked, tentative at first, then with a growing, instinctive confidence. His own ignored erection throbbed in time with the motions of his head. This was the fuel. This was what the serum wanted. The pure, raw connection. The submission. The power. He lost himself in the rhythm, in the taste, in the choked-off sounds Derek was making.
Derek’s hovering hand finally settled, not gently, on the back of Kyle’s head. It wasn’t a guide, just an anchor. A confirmation.
“Fuck,” Derek breathed, the word stretched and shattered. “Fuck, okay. Okay.”
The “okay” was a dam breaking. His hips gave a tiny, involuntary thrust. Kyle took it, welcomed it, his throat relaxing. He was good at this. He was made for this. The thought should have horrified him. It just made him take Derek deeper.
From the shower area, they heard the spray turn off, voices echoing. Someone would walk out in seconds.
Derek’s hand tightened in Kyle’s hair, pulling him off with a wet, soft pop. Kyle looked up, dazed, his lips swollen. Derek’s face was a mask of conflicted ecstasy—pleasure, shame, and a dawning, hungry realization.
“Not here,” Derek rasped. He yanked his sweats up, hastily covering himself. He looked down at Kyle, still on his knees, and the conflict in his eyes cleared for a second, leaving only stark desire. “My truck. Now.”
He turned and walked out, not looking back. Kyle scrambled to his feet, his body singing, every nerve alight. He wrapped the towel around his waist, hiding the desperate evidence of his own need. He grabbed his bag, his hands shaking.
He followed the path Derek had taken through the empty weight room, past the groaning bench press, towards the exit. The cool evening air hit his burning skin as he pushed the door open. Across the parking lot, he saw the tail lights of Derek’s old Ford pickup flash once, a red beacon in the dark.
Kyle started walking, then running, his new muscles carrying him effortlessly toward the unknown.
Kyle started walking, then running, his new muscles carrying him effortlessly toward the unknown. The cool night air did nothing to calm the furnace inside him. His heart was a jackhammer against his ribs, a rhythm matched only by the dull, persistent ache between his legs.
Derek’s truck was an island in the empty lot, engine off, lights dark. The driver’s side window was down. As Kyle approached, he could see the stark white-knuckle grip Derek had on the steering wheel.
He opened the passenger door and climbed in. The interior smelled of old coffee, leather, and now, the sharp salt of chlorine sweat. The space felt impossibly small, filled with the sheer physical presence of them. Neither spoke. The only sound was their breathing, ragged and out of sync.
Derek stared straight ahead through the windshield. “This is insane.”
“Yeah,” Kyle said, his voice rough. He was hyper-aware of every point where his body touched the seat, the door, the charged air separating him from Derek.
“I’ve never…” Derek trailed off, shaking his head. The movement made the corded muscle in his neck stand out. “Not with a guy. Not ever.”
“Me neither.” The admission was a relief. They were in the same alien country, without a map.
Derek finally turned his head. In the dim greenish light from the dash, his face was all hard angles and shadowed planes. His eyes searched Kyle’s, looking for an anchor. “Why did you do that?”
Kyle had no elegant answer. The truth was a blunt instrument. “I saw you and I had to. It wasn’t a thought. It was like… needing to breathe.”
A low sound escaped Derek’s throat. He looked away again, out into the dark. “Where do we go?”
“Anywhere. Just drive.”
Derek turned the key. The engine roared to life, a deep-throated sound that vibrated through Kyle’s bones. Derek threw the truck into gear and peeled out of the lot, tires chirping. They didn’t speak for ten minutes, just rode through the sleeping college town, the streetlights painting slow stripes of orange across their laps.
Kyle watched Derek’s profile, the tight set of his jaw, the way his massive hands manipulated the wheel with terrifying ease. The pressure in the cab built with every block. It was a physical thing, a third entity swelling in the space between them.
Derek turned down a service road, gravel crunching under the tires, and pulled into a deserted boat launch overlooking the black expanse of the reservoir. He killed the engine. The sudden silence was absolute, broken only by the faint lap of water against stone.
For a long moment, they just sat there, engulfed by the quiet and the dark.
“I can’t think straight,” Derek said, almost to himself. “It’s all just static. And want.”
“Then stop thinking.”
Kyle reached across the center console. His fingers brushed the dense muscle of Derek’s forearm. The contact was electric. Derek flinched, then turned his hand over, capturing Kyle’s fingers in a grip that could have shattered them. He didn’t squeeze. He held.
Then he pulled Kyle’s hand into his lap, pressing it firmly against the raging hardness there. Through the denim, Kyle could feel the heat, the sheer, formidable size. Derek’s eyes were closed, his head tipped back against the rest. “See?” he whispered, the word choked. “It doesn’t stop. You started it. You have to finish it.”
The command, wrapped in helpless need, undid Kyle completely. He fumbled with his own seatbelt, then Derek’s. “Back seat. Now. This cab is a coffin.”
They tumbled out of their doors into the cool night, the gravel sharp under their thin shoes. Derek yanked the rear door open and practically fell inside, pulling Kyle in after him. It was a clumsy, frantic scramble of limbs, a grunt of pain as an elbow connected with the window frame. There was no grace here, only necessity.
In the confined dark of the back seat, the world shrank to scent and touch and sound. The hungry, messy clash of mouths. The rasp of denim being shoved down hips. The shocked, guttural gasp as skin met skin.
Kyle was on top, driven by a hunger that felt older than he was. He rutted against Derek’s thigh, his own cock leaving a wet, hot streak on the rough fabric of Derek’s jeans. He was animal, pure sensation. But a part of him, the part that was still a nineteen-year-old who liked structured practice sets and protein shakes, watched in dizzy disbelief.
Derek’s hands were everywhere, mapping the new terrain of Kyle’s back, his arms, his shoulders, as if verifying the reality of him. He muttered into Kyle’s neck, a stream of fragmented, filthy praise that made Kyle burn. “God, look at you… all this… fucking made for it…”
It was over fast, a clumsy, explosive release that left them both sticky and gasping, tangled in the awkward geometry of the truck’s back seat. The frantic energy bled out, leaving a hollowed-out quiet.
Kyle collapsed against him, his forehead pressed to Derek’s collarbone. The sweat was cooling on his skin. The logical part of his brain, waking up from its chemical stupor, began to broadcast a low-frequency alarm. What have you done? What does this mean? What happens Monday at practice?
He felt Derek stiffen beneath him, the same realizations dawning. The shame was a tangible new presence, colder than the night air. Derek pushed at Kyle’s shoulder, not harshly, but firmly. “Get off. I can’t… I need air.”
Kyle rolled away, pulling his clothes back into some order. The space between them was instantly glacial. Derek sat up, head in his hands, his broad back a wall.
“Derek,” Kyle started, but had no words to follow the name.
“Don’t.” The word was flat, final. “Just don’t, Kyle. This was… a malfunction. The serum. It messed with our wiring. That’s all.”
It wasn’t all. Kyle could feel the lie in the heavy air. It was in the way Derek’s hands still trembled slightly. It was in the lingering brand of his mouth on Kyle’s skin.
Derek straightened up, a massive silhouette against the window. He took a deep, shuddering breath, as if steeling himself. Then he moved.
In the cramped dark, DEREK KNEELS.
He turned, lowering himself from the seat onto the floorwell of the truck, his big body folding into the limited space between the seats. He looked up at Kyle, his expression stripped raw in the moonlight filtering through the window. All the confusion, the shame, the anger—it had burned away, leaving behind something terrifyingly simple: need.
“It’s not the serum,” Derek said, his voice a hollow scrape. “I kept telling myself it was. But it’s not.” He reached out, his hand hovering near the waistband of Kyle’s sweats. His eyes asked a silent, devastating question. “My turn.”