Cover of The Gains of Lust

The Gains of Lust

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When gym buddies Jace and Ryan hit a plateau in their workout gains, they stumble upon an experimental serum promising extreme muscle growth and height enhancement. The side effects? Insatiable hunger—for gains and each other. As their bodies transform beyond their wildest dreams, so does their friendship, igniting a fiery passion neither can resist. But when the serum's effects spiral out of control, they must decide—chase the ultimate alpha male fantasy or salvage the real connection burning between them? Pumped full of tension and testosterone, this is friends-to-lovers with a steamy, muscle-bound twist.

Chapter 4: The Crucible

The air in the basement was a solid thing, a damp cloth of sweat, blood, and cheap cigars pressed against the face. It was a world away from the sterile, alpine scent of the penthouse gym. Ryan coughed, pulling his jacket collar up over his nose. “Jesus, Grant. This place is a biohazard.”

Grant didn’t seem to notice. His eyes, glowing with that faint, otherworldly blue, were fixed on the chain-link cage erected in the center of the room. The octagon was a scarred relic, its canvas floor stained a dark, map-like brown from old battles. The thud of flesh meeting flesh, the grunt of expelled air, the sharp crack of a jaw breaking—it was a symphony that resonated in his bones.

“It’s real,” Grant murmured, his voice a low thrum that cut through the crowd’s roar. He watched as a mountain of a man, his knuckles wrapped in dirty tape, drove a knee into his opponent’s ribs. The sound was wet, final.

“It’s barbaric,” Ryan shot back, his face pale under the flickering fluorescent lights. He grabbed Grant’s arm, his grip surprisingly weak. “Let’s go. This was a mistake. That text from Short… he said your cells were ‘rewriting.’ That doesn’t sound like a good thing, man. It sounds like a warning.”

Grant finally turned to look at him, and Ryan flinched at the flat, predatory emptiness in his gaze. The friendly blue was gone, swallowed by the light from within. “He’s a scientist in a lab coat. He measures things. I need to feel it.” His eyes drifted back to the cage. “I need to know what happens when this body meets something that can actually hurt it.”

A man with a thick neck and a clipboard pushed through the crowd towards them. “You Miller?”

Grant nodded once.

“You’re up next. Against ‘The Cinderblock.’ He’s 280. All muscle. You sure you wanna do this, kid? You look… lean.” The promoter’s eyes scanned Grant’s frame, missing the density, the strange, coiled stillness that had replaced his former gym-bred tension.

“I’m sure,” Grant said.

In the dim, urine-scented hallway that served as a locker room, Grant methodically unbuckled his leather belt, pulling it through the loops with a soft, deliberate hiss. He folded his clothes into a neat pile on a grimy bench, his movements economical, ritualistic. Ryan watched, his anxiety a live wire in the cramped space.

“This isn’t you, Grant. The guy who used to worry about his macros and getting eight hours of sleep? That guy wouldn’t be within a mile of this shithole.”

“That guy was a prototype,” Grant said, not looking up. He rolled his shoulders, and the muscles in his back shifted like tectonic plates. The faint, luminous tracery of veins pulsed in a slow, hungry rhythm. “This is the final product.”

The walk to the cage was a blur of leering faces and shouted bets. The odds were heavily against him. He looked like a lamb being led to slaughter. When the chain-link door clanged shut behind him, the world outside ceased to exist. There was only the stained canvas, the roar of the crowd, and The Cinderblock.

The man was a wall of scar tissue and malice. He sneered, revealing a gap where a tooth should have been. “Pretty boy,” he grunted, slamming a fist into his own palm. “Gonna break you in half.”

The bell rang.

The Cinderblock charged, a bull of a man, all momentum and brute force. Grant didn’t move. He stood, poised, watching the approach as if it were a weather pattern. At the last possible second, he shifted his weight. He didn’t punch. He simply placed his open palm on the man’s chest.

The effect was not of an impact, but of a sudden, absolute stop. The Cinderblock’s charge ended. His feet left the canvas as all his forward momentum was reversed. He flew backward, crashing into the chain-link with a sound like a bag of gravel being dropped. The fence groaned in protest.

Silence, for a heartbeat. Then, uproar.

The Cinderblock struggled to his feet, confusion and rage warring on his face. He charged again, swinging a wild, looping haymaker. Grant’s hand shot out, catching the fist in mid-air. The bones in the man’s hand made a sound like stepping on a bundle of dry twigs.

Grant didn’t smile. He applied pressure, forcing the bigger man to his knees. He looked down into his eyes, seeing only the reflection of his own glowing gaze. There was no contest. It was an inspection. A dissection.

He released the shattered hand. The Cinderblock gasped, cradling it. Grant took a single step forward and drove a short, sharp jab into the man’s solar plexus. It wasn’t a fight-ending blow. It was a punctuation. The Cinderblock folded, vomiting onto the canvas, all air and fight gone from him.

The crowd was on its feet, screaming, but their voices were a distant buzz. Grant turned, his chest barely rising and falling. He looked through the chain-link, past the stunned promoter, and found Ryan’s face in the crowd. Ryan’s expression was a perfect cocktail of awe and pure terror.

Grant walked to the corner of the cage where his opponent had entered. Leaning against the post was the next fighter, a man who moved with a languid, panther-like grace. He was smaller, leaner, his eyes sharp and intelligent. And when he cracked his neck, Grant saw it—a flicker of familiar, cerulean light deep within the capillaries of his sclera.

The man smiled, a cold, knowing thing. He gave Grant a slow, deliberate nod.

The promoter was at the cage door, his face alight with avarice. “Miller! Incredible! You’re a draw, kid! You fight him next? Double the purse!”

Grant didn’t look at the promoter. His eyes were locked on the new fighter. The hunger in his chest, momentarily sated, roared back to life, hotter and sharper than before.

“Tell him to get ready,” Grant said, his voice cutting through the noise. He never broke the staring contest. “The warm-up is over.”

The chain-link door screeched open again, a metallic invitation. Grant stepped through, the fence rattling shut behind him with a sound of finality. The noise of the crowd faded into a dull, throbbing hum, his focus narrowing to the man waiting for him.

This one was different. He didn’t pace or flex. He stood perfectly still in his corner, his breathing a slow, measured cycle. He was leaner than The Cinderblock, all coiled wire and sinew, with a web of faded scars crosshatching his knuckles. His eyes, a flat, gunmetal grey, held a chilling absence of emotion.

“They call me Silas,” the man said, his voice low and devoid of posturing. It was a simple statement of fact.

Grant just nodded, rolling his neck. The luminescent veins in his own arms pulsed in a quick, eager rhythm. He could feel the residual energy from the first fight crackling under his skin, a live wire looking for a ground.

The bell clanged.

Grant moved first, a blur of conditioned instinct. He threw a testing jab, faster than anything he’d ever thrown in the penthouse gym. Silas didn’t block it. He slipped his head a fraction of an inch, the glove whistling past his ear. He didn’t counter. He just watched.

A cold trickle of something unfamiliar seeped into Grant’s gut. It wasn’t fear. It was the absence of data. This man didn’t fight on emotion or rage.

Grant pressed, unleashing a combination of hooks and crosses that would have shattered concrete. Silas weaved and parried, his movements impossibly economical. Each block was a precise, jarring impact that traveled up Grant’s arms. He wasn’t just stopping the punches; he was dissecting them.

“You’re strong,” Silas remarked, his voice calm as he deflected a blow aimed at his liver. “New, though. The light’s still bright. Untempered.”

He moved then, not away, but inside Grant’s reach. His fist, wrapped in black tape, drove into Grant’s diaphragm. It wasn’t the overwhelming force of The Cinderblock. It was a precise, concentrated spike of agony that stole the air from Grant’s lungs and made his vision swim.

Grant staggered back a step, a first. The blue light in his veins flared, a visible surge of power flooding his system to counteract the damage. He could feel the tissues knitting back together, the pain receding into a dull throb.

Silas’s eyes tracked the glowing reaction with clinical interest. “Fascinating. The regeneration is autonomic. A panic response.”

No one had ever spoken to him like this in a fight. No one had ever looked at him like he was a specimen. A raw, hot anger, purer and more dangerous than any he’d felt before, ignited in his chest. It burned away the last vestiges of the cautious man from the gym.

He roared, a sound that was less human and more like rending metal, and charged. He abandoned form, abandoning strategy for pure, unleashed power. He grabbed Silas by the throat and slammed him against the cage wall. The chain-link shrieked in protest, bolts groaning in their sockets.

The crowd erupted, finally seeing the brutality they craved.

Grant drove a knee into Silas’s side, once, twice. He felt ribs yield under the impact. He was winning. He was dominating.

Silas, pinned and being pummeled, looked up at him. There was no pain in his eyes. No fear. Only that same flat, analytical calm. He coughed, a speck of blood dotting his lip.

“Is that all?” he whispered, his voice grating. “Just more force?”

Then Silas’s hands came up, not to strike, but to grasp Grant’s head. His thumbs pressed hard into the spaces behind Grant’s jaw, right where the pulsating blue light was most concentrated beneath the skin.

A jolt, white-hot and seismic, exploded through Grant’s skull. It wasn’t pain. It was a system failure. His muscles locked, his vision dissolving into static. The glorious, humming power in his veins stuttered and went dark for a terrifying second.

He collapsed to his knees, his body refusing to obey. The world tilted, the roar of the crowd becoming a distant, muffled roar. He looked up, disoriented, his body feeling hollowed out.

Silas stood over him, wiping the blood from his mouth. He leaned down, his voice for Grant’s ears only.

“Dr. Short sends his regards.”

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