The locker room door banged open-too loud, too sudden-and Ryan flinched against Marc’s chest, his fingers digging into Marc’s newly thickened shoulders. Marc didn’t move. His grip tightened around Ryan’s waist, pressing him harder against the lockers, shielding him from view with his own bulk.
“Shit,” someone muttered-a voice Marc vaguely recognized from the free weights area. Footsteps hesitated near the showers, then retreated fast, the door swinging shut with a clatter.
Ryan exhaled sharply against Marc's collarbone, his body still trembling from the aftershocks. The echo of retreating footsteps lingered in the air, but Marc didn't loosen his grip-if anything, his arms flexed tighter around Ryan, the new bulk of his muscles pressing Ryan into the cold metal lockers. The contrast between them was undeniable now: Ryan's frame subtly diminished, Marc's exaggeratedly dominant.
"You okay?" Marc murmured, lips brushing Ryan's temple. His voice was deeper, rougher-like his vocal cords had thickened along with the rest of him.
Ryan swallowed hard. His thighs were slick with a mixture of sweat and cum, his hole still fluttering around nothing. "Think you broke me," he admitted hoarsely, flexing his fingers against Marc's biceps. The muscle there was denser than before, veins standing in sharp relief under damp skin.
Marc grinned, slow and predatory. His thumb traced the newly softened line of Ryan's jaw. "Just a preview." He shifted his weight, the motion deliberate, and Ryan gasped as Marc's thigh slid between his legs, pressing against his oversensitive cock. "Feel that?" Marc murmured, palming the swell of his own pec-fuller now, rounder. "Your strength. Your mass. It's *mine* now."
Ryan's breath hitched. The claim should've rankled-six years of disciplined training siphoned away in minutes-but the possessiveness in Marc's tone sent heat pooling low in his gut. His cock twitched weakly against Marc's thigh, still spent but responding nonetheless.
The locker room hummed with the distant sound of water pipes groaning-someone in the showers, far enough away to ignore. Ryan’s fingers flexed against Marc’s chest, tracing the newly hardened planes of his pecs. The difference was subtle but *there*: Marc’s body fuller, denser, while Ryan’s own muscles ached with a phantom hollowness, like his bones had been hollowed out just slightly.
Marc exhaled sharply when Ryan’s thumb brushed his nipple. "Still sensitive?" Ryan murmured, voice wrecked. His own throat burned from earlier, his lips still swollen.
"Fuck yeah," Marc admitted, hips rolling forward instinctively. His cock was half-hard again, pressed hot against Ryan’s thigh. "Your body just-*gives*. Like it was made for this." His palm slid down Ryan’s flank, lingering over the slight dip where his obliques had softened.
Ryan shuddered. The loss should’ve pissed him off-years of deadlifts and protein shakes siphoned away in minutes-but the raw *hunger* in Marc’s gaze made his stomach twist. "How much did you take?" he asked, voice low.
Marc’s grin was all teeth. He flexed his biceps deliberately, the muscle swelling obscenely under Ryan’s palm. "Five percent. Maybe six." His thumb pressed into the hollow of Ryan’s throat. "Enough that you’ll feel it tomorrow."
Ryan's fingers trembled against Marc's chest, tracing the newly prominent veins that hadn't been there an hour ago. The locker room smelled of sweat and sex, the air thick with humidity, but all Ryan could focus on was the way Marc's heartbeat thudded against his palm-stronger now, steadier. His own pulse skittered in comparison, rabbit-quick and uneven.
"You're shaking," Marc murmured, catching Ryan's wrist with effortless strength. His grip was different-firmer, more controlled-and Ryan couldn't suppress the shiver that ran through him. Marc's grin widened. "Adrenaline crash. Your body's figuring out the new balance." He dragged Ryan's hand lower, pressing it against his own abs-harder now, more defined. "While mine's already adjusted."
Ryan swallowed hard. The difference was undeniable. Where Marc's stomach had been sculpted before, it was now carved, each ridge standing in sharp relief under his fingertips. Meanwhile, his own core ached with a strange hollowness, like someone had scooped out the densest parts of his muscle and left the rest behind.
Marc's free hand slid around Ryan's waist, pulling him closer until their hips aligned. Ryan gasped-his cock was still soft, oversensitive, but Marc's was already half-hard again, thick and hot against his thigh. "Fuck," Ryan breathed, staring down at the contrast. "How are you-?"
"Energy transfer," Marc cut in, voice low. He rocked forward deliberately, his erection dragging against Ryan's hip. "Took your strength. Your stamina." His thumb brushed Ryan's bottom lip. "Your recovery time." The grin he flashed was wolfish. "Guess which one of us is going again first?"
Ryan's breath hitched when Marc's fingers tangled in his hair again, tilting his head back until their eyes locked. The difference in their strength was palpable now-Marc's grip effortlessly dominant, his arms corded with new muscle that hadn't been there before.
"Bet you can't even curl forty pounds right now," Marc murmured, dragging his free hand down Ryan's chest, lingering over the slight dip where his pectorals had softened. Ryan shuddered, his cock twitching weakly against Marc's thigh. The taunt should've stung, but the heat in Marc's gaze made his stomach twist.
Then Marc moved-too fast, leveraging his stolen strength to spin Ryan around and slam him chest-first against the lockers. The metal rattled violently, echoing through the empty room. Ryan gasped as Marc's newly thickened frame pinned him in place, one broad hand splayed between his shoulder blades while the other gripped his hip hard enough to bruise.
"Feel that?" Marc growled against Ryan's ear, rolling his hips forward so his half-hard cock ground against Ryan's ass. The friction sent sparks up Ryan's spine-his body still hypersensitive from earlier. "Every pound you lost?" His teeth scraped Ryan's neck. "I can *feel* it in my veins."
Ryan's knees buckled when Marc's fingers traced his stretched rim, still loose and slick from before. A whimper tore from his throat as two fingers slid back in effortlessly, crooking forward to rub that spot inside him that made his vision blur. "F-fuck-"
Ryan’s hips jerked back involuntarily, his ass pressing against Marc’s fingers, his cock twitching back to life despite the oversensitivity. “Christ,” he gasped, forehead pressing against the cool metal of the locker. “You’re-fuck-” His words dissolved into a moan as Marc’s fingers curled deeper, rubbing firm circles inside him.
Marc’s laugh was dark, his breath hot against Ryan’s neck. “Told you,” he murmured, his free hand sliding around Ryan’s waist to palm his cock, already half-hard again. “Your body’s mine now. It *wants* this.” His grip tightened, thumb swiping over Ryan’s slit, and Ryan’s knees nearly gave out.
The contrast was undeniable-Marc’s hand broader now, his fingers thicker, his grip effortlessly dominant where Ryan’s muscles had softened just enough to notice. Ryan’s chest heaved, his abs flexing weakly as Marc worked him open, his fingers scissoring in a slow, relentless rhythm.
Then Marc pulled his fingers free with a wet pop, and Ryan groaned at the loss, his hole fluttering around nothing. Before he could protest, Marc’s hands were on his hips, yanking him back hard-and Ryan felt the thick, hot press of Marc’s cock against his entrance.
“Wait-” Ryan’s voice cracked, his fingers scrambling against the locker. “I’m not-fuck, I’m not ready for-”
The protest died in Ryan’s throat as Marc’s cock breached him in one smooth, relentless thrust. Ryan’s back arched violently, his mouth falling open in a silent scream as Marc buried himself to the hilt. The stretch was brutal-worse than before, his rim burning white-hot around Marc’s girth-but the fullness was intoxicating. Marc didn’t give him time to adjust. He pulled out almost entirely, then slammed back in, his hips snapping forward with brutal precision.
Ryan’s vision faded slightly. His fingers scrabbled against the locker, his thighs trembling where they were forced wide. Marc’s grip on his hips was ironclad, fingers digging into the newly softened flesh as he set a punishing pace. Each thrust punched the air from Ryan’s lungs, his cock bouncing untouched between his thighs, leaking pathetically onto the tile.
“Fuck, you’re tight,” Marc growled, his voice rougher, deeper than before. His chest pressed flush against Ryan’s back, the heat of his body overwhelming. Ryan could feel the difference now-Marc’s muscles thicker, denser, his movements more controlled. Every snap of his hips was calculated, leveraging the stolen strength to drive deeper, harder.
Ryan’s knees threatened to give out, but Marc held him up effortlessly, his arms flexing with newfound power. “Feel that?” Marc rasped, biting down on Ryan’s shoulder. “Your strength. Your stamina. It’s *mine* now.” His hand slid around Ryan’s waist, fingers tracing the faint dip where his abs had softened. “And you’re fucking *weak* for it.”
The taunt sent a jolt of heat straight to Ryan’s gut. His cock throbbed, his hole clenching around Marc’s length as if trying to pull him deeper. Marc groaned, his rhythm faltering for the first time. “Christ-*fuck*-” His hips stuttered, his grip tightening as he bottomed out, grinding Ryan against the lockers.
Ryan’s fingers scraped against the locker door, his entire body shaking as Marc’s thrusts grew rougher, deeper-each snap of his hips forcing Ryan onto his toes. The overstimulation should have been unbearable, but Ryan’s body arched back like a bowstring, his hole clamping down in ragged pulses. Marc’s groan was guttural, his teeth sinking into Ryan’s shoulder as his rhythm fractured.
Then-with a final, brutal thrust-Marc came, his hips jerking erratically as he spilled inside Ryan, hot and thick. Ryan whimpered, oversensitive and trembling, but Marc didn’t pull out. Instead, he pressed closer, his breath ragged against Ryan’s neck, his softening cock still seated deep.
"Jesus," Marc panted, his voice wrecked. His hands slid down Ryan’s sides, tracing the newly softened contours of his waist with unmistakable possessiveness. "Look at you."
Ryan’s legs gave out. He slumped forward, barely catching himself against the locker, but Marc’s grip tightened-effortlessly holding him upright. The ease of it sent a fresh wave of heat through Ryan’s gut.
Marc chuckled darkly, his lips brushing Ryan’s ear. "Told you," he murmured, rolling his hips just enough to make Ryan shudder. "Five percent." His palm smoothed over Ryan’s stomach, fingers splaying across the slight dip where his abs had been. "Just enough to feel it."
The locker room air hummed with the sound of their ragged breathing-Ryan's shallow and uneven, Marc's deep and controlled. Ryan could *feel* the difference in every exhale, every heartbeat. His own pulse fluttered like a trapped bird against his ribs, while Marc's thudded slow and heavy beneath his palm where it still splayed across Marc's chest.
Marc's fingers traced the curve of Ryan's hip, possessive and lingering. "Still with me?" he murmured, his voice rough with satisfaction. Ryan nodded weakly, his throat too raw to speak. His legs trembled, muscles slack with exhaustion, but Marc held him up effortlessly-*newly* effortlessly. Ryan swallowed hard. The realization should've unsettled him. Instead, his spent cock twitched against his thigh.
A slow grin spread across Marc's face as he felt it. "Christ, Ry," he muttered, dragging his thumb over Ryan's bottom lip. "You *like* this." It wasn't a question. Ryan's body had answered for him-his hole still fluttering around Marc's softening cock, his thighs shaking where Marc's grip kept them spread.
The distant clang of a locker shutting somewhere down the row made Ryan flinch. Marc didn't move. His arms flexed tighter around Ryan, shielding him from view with his own bulk-broader now, *heavier*. The difference was undeniable. Ryan's skin prickled where Marc's sweat-slick chest pressed against his back, the heat of him overwhelming.
"You're *mine* now," Marc breathed against Ryan's neck, his teeth scraping the sensitive skin there. The words sent a shudder through Ryan-part fear, part *want*-and Marc chuckled, low and dark. "Don't worry," he murmured, palming Ryan's softened abs. "I'll take care of you." His hand slid lower, fingers brushing Ryan's oversensitive cock. "*Better* than you could."
Marc left Ryan on the bench closest to his locker and headed for the shower. Marc stayed in the shower for a while appreciating the new growth that formed on his body. The shower water ran cold long before Marc bothered to turn it off. He stood under the spray, letting the icy droplets roll down his newly thickened shoulders-broader now, heavier with stolen muscle. His reflection in the fogged-up tiles showed sharper angles, deeper cuts between his abs. Ryan’s strength hummed beneath his skin like a live wire.
Ryan himself was slumped on the bench by the lockers, wrapped in Marc’s hoodie-swallowed whole by it, really. His legs trembled visibly even at rest, his fingers fumbling with the protein bar Marc had tossed him earlier. The sight sent a possessive thrill through Marc’s gut. *His.* Every ounce of weakness in Ryan’s body was Marc’s doing.
Marc toweled off roughly, the fabric catching on his newly prominent veins. Marc got dressed and headed out of the lockerroom. The gym was thinning out-evening crowd giving way to the hardcore lifters, the ones who trained past midnight. Perfect…
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