Chapter 1: The Mirror and the Measure
The locker room air hung thick and damp, smelling sharply of disinfectant trying and failing to mask decades of sweat soaked into concrete. Andrew stood shirtless before the long mirror, the harsh fluorescent lights bleaching his skin but highlighting every ridge and valley of muscle he’d carved over countless hours. Water droplets clung to his buzzed scalp, tracing paths down the dense forest of his trapezius muscles before vanishing into the waistband of his grey sweat shorts. He flexed, a slow, deliberate contraction that made his biceps swell like cannonballs beneath the skin, thick veins rising like blue rivers across the dense flesh.
"Damn," Steven breathed, the word barely audible over the echoing clang of a dropped dumbbell from the gym floor beyond. He leaned against the cool metal lockers, towel draped over his shoulder, watching. Not just watching Andrew flex, but absorbing the sheer physicality of him. The way the light caught the sweat sheen on his broad back, the defined striations in his lats flaring like wings, the surprising thickness of his thighs straining the fabric of his shorts. Steven’s own post-workout fatigue felt suddenly secondary, replaced by a low hum of something else entirely.
Andrew grinned, catching Steven’s reflection. "Feeling the pump today, Stevie. Chest and tris were brutal." He rolled his massive shoulders, the joints popping softly. He traced a thick finger along the prominent vein snaking down his right arm. "Look at that vascularity. Never used to pop like this."
Steven pushed off the lockers, forcing his gaze away from Andrew’s arms to meet his eyes in the mirror. Andrew’s eyes were bright, focused entirely on his own reflection, utterly unaware of the intensity of Steven’s scrutiny. "Yeah," Steven managed, his voice slightly rough. "You’re… definitely growing." He gestured vaguely towards Andrew’s frame. "Everywhere."
Andrew chuckled, a deep rumble in his chest. He patted his rock-hard abdomen. "Hitting those macros hard, man. Five-thousand calories minimum. Feels like I’m eating constantly." He turned slightly, admiring the sweep of his obliques. "Waist is holding steady at thirty-three inches, though. Can’t let that creep up." His hand drifted unconsciously towards his gym bag, slumped open on the bench beside him. Fingers brushed against the familiar plastic rectangle nestled inside.
Steven’s gaze snapped to the movement. He knew what was in that bag. Knew Andrew’s meticulous nature extended beyond counting grams of protein and tracking sets. Andrew documented everything. Shoulders, chest, arms, calves… and other things. Private things. Things Steven tried desperately not to think about, yet found his mind circling back to constantly, especially lately.
"You measure everything," Steven said, trying for lightness but hearing the slight tension in his own voice. He took a step closer, the scent of Andrew’s sweat – sharp, musky, strangely compelling – filling his nostrils. He watched Andrew’s thick fingers hover near the bag’s opening.
"Gotta track progress," Andrew replied, oblivious. He finally pulled the tape measure out. The yellow plastic gleamed under the lights. "Numbers don't lie. Motivation, you know?" He stretched the tape between his hands, the metal end clicking softly. "Arms hit nineteen and a quarter cold today. Up half an inch from last month." Pride warmed his tone.
Steven’s eyes weren’t on the tape measure in Andrew’s hands. They were fixed on Andrew himself. On the powerful forearms corded with muscle as he handled the tape. On the way his sweat shorts rode low on his hips, clinging to the thick curve of his quadriceps. On the undeniable bulge beneath the thin grey fabric, accentuated by his stance and the sheer mass of his thighs. Steven swallowed, his mouth suddenly dry. He remembered Andrew mentioning, offhandedly weeks ago, surprised laughter in his voice, that even that seemed to be responding to the heavy lifting and caloric surplus. "Weirdest thing, man. Measured it yesterday. Solid eight now. Girth’s up too, like six inches around. Guess everything’s growing." Steven hadn’t known where to look then. He didn’t know where to look now.
Andrew glanced down, finally noticing Steven’s intense, slightly unfocused stare. Not at the tape measure, but lower. Much lower. Andrew followed Steven’s gaze down his own body, past the defined abs, to where the worn fabric of his shorts stretched taut.
A beat of silence stretched, thick and electric. The distant clatter of weights faded. The dripping showerhead in the corner sounded suddenly loud. Andrew’s brow furrowed slightly, not in anger, but in genuine, slow-dawning confusion. The tape measure hung forgotten in his hand. He looked back up at Steven, whose face was now flushed, eyes wide with a mixture of panic and something else Andrew couldn’t quite name – something that made his own pulse kick unexpectedly against his ribs.
Steven opened his mouth, but no sound came out. The carefully constructed wall of casual friendship felt like it was cracking right there in the sterile, echoing locker room. The numbers – the arms, the waist, the calories, the impossible, intimate measurements Andrew tracked so diligently – suddenly felt charged with a meaning Andrew had never considered. He stared at Steven, the tape measure cold against his palm, the unspoken question hanging heavy in the humid air between them. What exactly had Steven been looking at? And why did the thought make Andrew’s skin prickle with a strange, unfamiliar heat? Steven took a jerky step back, bumping into the lockers with a metallic clang that shattered the fragile silence. He looked like he wanted to bolt. Andrew just stood there, frozen, the reality of that lingering gaze finally, irrevocably, sinking in. Monday’s workout suddenly felt a million miles away.
The metallic clang of Steven hitting the lockers echoed sharply in the sudden silence. Andrew remained frozen, the yellow tape measure limp in his hand, the cool plastic suddenly feeling alien against his skin. Steven’s gaze, so intensely focused there, lingered in Andrew’s mind like a brand. The locker room’s usual background noise – distant clangs, showers running, locker doors slamming – seemed muffled, distant. Only Steven’s panicked, flushed face and Andrew’s own thudding heartbeat were real.
Steven scrambled to break the suffocating tension. "S-sweat shorts shrinking?" he blurted out, voice cracking slightly. He gestured vaguely towards Andrew’s hips, his eyes darting anywhere but downwards now. "Laundry disaster. Hate when that happens."
Andrew blinked, the practical explanation cutting through the weirdness. Shrinking shorts. Of course. That made sense. Far more sense than… whatever the alternative was. He looked down again, frowning. The grey fabric did seem tighter across his thighs than he remembered when he’d put them on. Annoying, but fixable. He needed a distraction, something solid and familiar. His reflection.
He turned back to the mirror, seeking reassurance in the lines of muscle he knew so well. He rolled his shoulders, the familiar ache from the bench press grounding him. He sucked in a breath, tightened his core, and threw his mind into the flex. Harder. Right bicep. Contract. Squeeze every fiber. Visualize the peak swelling against his skin. He locked eyes with his reflection, channeling his slight confusion and the lingering discomfort into sheer physical force.
Steven, desperate for anything to look at besides Andrew’s midsection, watched the flex. Then he froze again. His eyes widened, not with panic this time, but with pure disbelief. "Whoa, Drew," he breathed, stepping closer without thinking. "Check your arm. Right now."
Andrew glanced sideways, still holding the pose. "What about it? Pump’s killer." But even as he spoke, he saw it. The dense ball of his bicep wasn't just pumped; it looked… bigger. Fuller. The blue veins snaking across it seemed thicker, darker, more pronounced. The peak wasn't just peaked; it was cresting higher, straining against his skin with an unnatural tautness. He hadn't changed his grip, hadn't shifted his stance. He was just… flexing harder than he ever had before? But this felt different. It wasn't the satisfying burn of lactic acid; it was a deeper, almost cellular thrumming.
"Seriously, dude," Steven insisted, now standing beside him, pointing. "Look at the damn tape measure you're holding!"
Andrew looked down at the forgotten tape measure in his left hand. He looked back at his right arm, still fiercely clenched. The visual discrepancy was undeniable. The muscle mass looked visibly larger than it had thirty seconds ago. Larger than any pump could explain.
"Okay, this is weird," Andrew admitted, his voice losing its usual confident rumble. He relaxed his arm. Instantly, the muscle seemed to deflate slightly, settling back – but not entirely. It didn't return to its previous 'cold' state. It remained denser, thicker.
"Flex again," Steven urged, his scientific curiosity momentarily overriding his earlier awkwardness. "Hard. Like you mean it."
Andrew hesitated, a prickle of unease replacing confusion. But the lure of the impossible was too strong. He focused, gritting his teeth. He didn't just flex; he commanded his bicep to contract with every ounce of neurological willpower he possessed. He visualized the muscle fibers swelling, multiplying.
"Holy shit," Steven gasped.
It happened faster this time. Andrew watched in the mirror as his bicep seemed to inflate. Not like a balloon, but like rock swelling under immense pressure. The skin tightened, stretching visibly, becoming shiny. The striations deepened into harsh, defined canyons. The veins thickened into ropes, pulsing visibly with each heartbeat. Andrew felt it too – a deep, internal pressure, a stretching sensation deeper than fascia, radiating warmth.
He glanced frantically at the tape measure. He fumbled, dropping it. Steven snatched it off the bench before it hit the floor. "Here!" Steven looped the end clumsily around Andrew’s upper arm, just below the peak. His fingers brushed the hot, straining muscle. Andrew flinched slightly at the contact, but Steven was laser-focused on the numbers. He pulled the tape snug.
"Nineteen and a half," Steven whispered, voice tight with awe and disbelief. "Cold was nineteen and a quarter ten minutes ago. Pumped was maybe nineteen and three-quarters tops? This is… nineteen and a half while you're flexing? No way."
Andrew relaxed his arm. The muscle softened, but again, only partially. Steven kept the tape measure in place. "Still nineteen and three-eighths," he reported, shaking his head slowly. "That’s bigger than your cold measurement before you started."
A disbelieving laugh escaped Andrew. "Okay, okay. Freak pump. Weird vascularity day. Whatever." But he didn't believe it. The deep, warm thrumming was still there, faint but persistent, like a dormant engine idling.
He shifted his weight, trying to shake off the strangeness. He casually hit a double-biceps pose, automatically tensing his entire upper body. He needed to see the symmetry, the overall picture.
The shift was instantaneous and terrifying.
Andrew gasped, a sharp intake of breath that hissed through his teeth. The thrumming surged, a wave of deep, internal heat cascading through his torso and limbs. Steven stumbled backwards, dropping the tape measure completely.
"Drew! What the hell?!"
Andrew wasn't listening. He was staring, horrified and fascinated, at his reflection. His chest swelled violently, pecs thickening and hardening, pushing outwards against skin that now looked stretched thin and painfully tight. The ridges of his abs deepened impossibly, carving brutal lines down his stomach. His shoulders seemed to broaden, deltoids rounding and expanding, pressing against the limits of his skin. He could feel his lats flaring wider, scraping against the inside of his sweat jacket still hanging on the locker door behind him.
The pressure wasn't just on his arms anymore. It was everywhere. A deep, insistent pushing from within. His thighs screamed against the confines of his grey shorts. He heard a faint, ominous creak from the seams.
"Steven!" Andrew choked out, panic clawing its way up his throat. He looked down at himself. The shorts weren't just tight anymore. They were straining, the fabric pulled drum-skin taut across his explosively expanding quads. The bulge Steven had stared at moments ago was now unmistakably, alarmingly prominent, not just from misplaced attention, but because everything was growing. Fast.
His legs trembled with the sheer internal force. The deep thrumming intensified into a roar only he could hear, a vibration deep within his bones, within his very cells. He brought his hands up instinctively, palms pressing against the hot, rock-hard expanse of his swelling chest, as if he could hold back the tide. He felt like he was being inflated from the inside, muscles expanding relentlessly, pushing against the barrier of his own skin.
He locked eyes with Steven in the mirror. His friend's face was a mask of pure, unadulterated shock. Andrew’s own reflection stared back, eyes wide with dawning terror, trapped within a body rapidly transforming beyond recognition, beyond control. The heat intensified. The pressure mounted. The faint creak of stressed fabric became a sharper, more insistent tearing sound.
The tearing sound wasn't sharp. It was a deep, sickening rrrriiiippp that cut through the locker room’s humid air louder than any dropped weight. Andrew looked down, the horror solidifying into cold dread in his gut.
His grey sweat shorts, stretched beyond endurance by the relentless expansion of his quadriceps and the terrifying pressure building in his groin, had split wide open along both inner seams. The shredded fabric hung in flaps, useless. And there, springing free from the ruin of cotton-polyester blend, was the undeniable, overwhelming evidence of the growth spurt he’d mentioned weeks ago – now terrifyingly amplified. It wasn't just thick anymore; it looked impossibly substantial, jutting out aggressively, flushed and violently prominent against the shocking vulnerability of the torn shorts. The dusky skin was stretched taut, veins standing out in stark relief. It pulsed visibly, seemingly in time with the deep, cellular thrumming that now vibrated his entire being.
Steven’s choked gasp was pure, unadulterated shock. His eyes, wide and unblinking, were locked onto the impossible sight. Not with desire now, but with primal, paralyzing disbelief. "Andrew... holy fucking Christ..." The words were a strangled whisper.
Andrew couldn’t move. Couldn’t breathe. The heat radiating from his own engorged flesh was intense, almost feverish. He could feel every frantic heartbeat pounding through it. The sheer, humiliating exposure, coupled with the terrifying lack of control over his own body, was a suffocating wave. He instinctively tried to hunch, to cover himself, but the sheer mass of his swollen chest and shoulders made the movement awkward, futile. His massive arms felt leaden, trapped by his own expanding musculature. He managed to bring one thick forearm down in a clumsy, shielding motion, but it felt laughably inadequate against the sheer scale of his exposure. The deep thrumming intensified. He could feel it – a relentless internal pressure, a pushing, stretching sensation deep within his core, within his hips, within his very groin. The terrifying thought slammed into him: It's not stopping. It's still growing.
Steven saw it too. Saw the subtle, horrifying expansion even beyond the initial shocking reveal. Saw the skin stretch fractionally tighter. Saw the veins darken. Panic, pure and instinctive, overrode disbelief. He wasn’t thinking about awkwardness or desire or boundaries. He was reacting to the sheer, visceral wrongness of what was happening to his friend. Andrew was exploding, tearing apart, and Steven couldn't just stand there.
"Drew, stop!" Steven yelled, the sound raw. He lunged forward, not away, but toward the terrifying spectacle. His hand shot out, not in a caress, but in a desperate, clumsy attempt to contain, to hide, to somehow stop the relentless growth. His fingers, cold with shock and slick with sweat, closed around the hot, impossibly thick base of Andrew’s exposed cock just as it visibly surged again. The sensation was electric and horrific – the shocking heat, the alien hardness, the terrifying thrum of relentless expansion vibrating against his palm.
Andrew froze. Utterly. Every expanding muscle locked. His breath hitched in his massive chest. His eyes, wide with terror and a dawning, profound mortification, snapped to Steven’s, then down to where Steven’s hand was desperately gripping him, trying to physically hold back the impossible tide of his own runaway body. The intense heat where Steven touched him was a brand. The thrumming pulsed against Steven's palm, insistent and terrifying. The locker room air, thick with the scent of sweat, disinfectant, and sheer panic, seemed to solidify around them. Time stopped. Sound vanished. All that existed was the crushing pressure within Andrew’s body, the frantic pulse hammering against Steven’s clenched fingers, and the shared, paralyzing horror of the impossible thing happening between them. Steven’s grip tightened instinctively, knuckles white, his own breath coming in ragged gasps as he stared at his hand, at the flushed, monstrous thickness it was failing to contain, at the reflection of utter devastation in Andrew’s eyes.
Steven’s grip tightened instinctively, knuckles white, his own breath coming in ragged gasps as he stared at his hand, at the flushed, monstrous thickness it was failing to contain, at the reflection of utter devastation in Andrew’s eyes. The thrumming pulse under his palm was terrifyingly alien, a relentless engine driving uncontrolled expansion. The heat radiating from Andrew’s skin was intense, almost feverish.
A strangled sound escaped Andrew’s throat, a mixture of horror, disbelief, and profound, naked shame. He didn’t move, locked in place by the shock and the sheer, overwhelming pressure building within him.
Steven yanked his hand back as if burned, stumbling back another step. His own hand tingled, the memory of that unnatural heat and impossible hardness seared into his palm. The shredded remains of Andrew’s shorts hung obscenely, offering no cover. "Christ, Drew," Steven choked out, wiping his hand frantically on his own gym shorts. "What… what is this?"
Andrew finally moved, a jerky, desperate attempt to cover himself. He crossed his massive forearms over his lower abdomen, but the sheer bulk of his arms, his chest, his everything, made it futile. His biceps strained against each other, veins popping obscenely. He looked wildly around the deserted locker room, a trapped animal. "I don’t… I don’t know!" The rumble in his voice was laced with panic. "It just… keeps happening. The thrumming… it won’t stop!" He squeezed his eyes shut, grimacing. "It’s… pushing."
Steven forced himself to breathe, to push past the raw shock. Andrew wasn’t just embarrassed; he was terrified. And whatever was happening was physical, measurable. Steven’s mind, trained by years of tracking reps and weights, latched onto the one thing he understood: data. Numbers. Proof.
"We need to… we need to see," Steven said, his voice gaining a shaky steadiness. He gestured towards Andrew, then flinched at his own motion. "Not… not that. Everything. All of it. How much… how much have you grown?"
Andrew’s eyes snapped open, wide with confusion. "What?"
"Measurements, Drew!" Steven insisted, urgency cutting through his own awkwardness. He pointed to the yellow tape measure lying discarded on the tile floor near Andrew’s gym bag. "Right now! Your arms looked bigger just flexing! Your chest… your legs…" He trailed off, glancing down, then quickly away. "Everything. We need numbers. Maybe… maybe it’s stopping? Maybe we can figure out why." It was a flimsy lifeline, but it was action. It was something to do besides stand there drowning in horror.
The logic pierced Andrew’s panic. Numbers. Tracking progress. That was his language. He gave a jerky nod, his massive shoulders tense. "Okay. Yeah. Okay."
Steven scooped up the tape measure, the cold plastic a grounding sensation. He avoided looking directly at Andrew's exposed groin, focusing instead on the familiar terrain of muscle. "Height first," he declared, his voice tight but practical. "Back against the locker."
Andrew shuffled backwards, his movements stiff and clumsy in his muscular bulk, until his shoulder blades pressed against the cool metal locker door. He stood unnaturally straight, trying to ignore the terrifying thrumming sensation still vibrating deep within his core and limbs. Steven stepped close, holding the tape measure vertically. Andrew had always been a solid six-two. Steven stretched the tape to the crown of Andrew’s buzzed head. The number punched the air.
"Six-four," Steven breathed, disbelief warring with a grim sense of confirmation. "Drew, you’re six-four."
Andrew’s jaw clenched. "Bullshit. Was six-two this morning."
"Was it?" Steven countered, already moving. "Scale. Now." He pointed to the industrial digital scale tucked near the showers. Andrew lumbered towards it, the ripped seams of his shorts whispering against his rapidly thickening thighs. He stepped on. The digital display flickered, then settled.
Steven stared. "Two-sixty-five." His voice was flat. "Drew… you were two-twenty-five yesterday."
Andrew stared down at the number. Two-sixty-five. Forty pounds. In one afternoon? Impossible. The thrumming vibrated through the soles of his feet. "This isn’t real," he whispered, but the hard metal under his feet and the impossible number argued otherwise.
Steven was already circling him with the tape measure, the scientist in him overriding everything else. "Biceps. Cold." His fingers were clinical as he looped the tape around Andrew’s massive right arm, just below the peak. He pulled it snug. "Twenty inches even." He swallowed. "You were nineteen and a quarter cold this afternoon."
Andrew flexed slightly without prompting. The muscle surged visibly under the skin. "Flexed?" Steven asked, his voice strained. He measured again. "Twenty-one and an eighth." Andrew’s previous best flex was barely over nineteen and three-quarters. The sheer leap was monstrous.
"Forearms," Steven commanded, moving down. The thick cords of muscle bulged even at rest. "Seventeen inches." Up three-quarters of an inch from before. "Chest." Steven wrapped the tape around Andrew’s barrel-like torso, high under the armpits. Andrew sucked in a breath, his pecs swelling impossibly. "Fifty-six inches." An increase of nearly five inches. Steven’s knuckles brushed slick, hot skin as he measured. "Waist." He looped it around Andrew’s abdomen, just above the crest of his pelvis. Despite the massive caloric surplus, it was a miracle. "Thirty-four." Only an inch up. The growth was hyper-targeted muscle, not fat.
"Quads." Steven knelt, his face uncomfortably close to the torn fabric and what lay beneath. He focused fiercely on the massive sweep of Andrew’s thigh. He pulled the tape taut. "Thirty-one inches." He looked up at Andrew, his expression grim. "You were twenty-eight cold yesterday." Three inches. Pure dense muscle.
"Calves." Eighteen inches. Up two inches. "Shoulders." Steven measured biacromial width – the distance between the bony points at the tops of the shoulders. "Twenty-four inches." A brutal increase of three inches, explaining the feeling of his lats scraping the locker.
Steven stood back, breathing hard, the numbers blurring in his mind. The sheer scale of the transformation was staggering. Then his gaze drifted down, unavoidable. He steeled himself. This wasn't desire now. It was cataloging a terrifying anomaly. "Hand length," he said abruptly, seizing on a neutral point. Andrew held out a massive hand. Steven measured from wrist crease to middle fingertip. "Nine and a half inches." Up a full inch, the fingers thicker, knuckles more pronounced.
Finally, the air grew thick again. Steven couldn't put it off. He gestured vaguely downwards, unable to meet Andrew's eyes. "I… need to measure… that." His voice was barely audible.
Andrew flinched, a deep flush spreading up his neck, clashing with the dusky gold of his skin. He looked away, staring fixedly at the lockers opposite. He gave a stiff, almost imperceptible nod.
Steven knelt again, the tile cold against his knees. His hands shook slightly as he carefully, clinically, looped the tape measure around the impossibly thick base. The heat radiating from the engorged flesh was intense. He pulled the tape snug, his fingers brushing burning skin. He forced himself to look at the numbers. "Nine and a half inches long." His voice cracked. "Seven and a quarter around." A brutal increase in both dimensions.
He dropped the tape measure like it was electrified, scrambling back to his feet. He couldn't look at Andrew. The numbers screamed in his head: Nine and a half. Seven and a quarter. From eight and six. In minutes? Hours? It defied biology, physics, sanity.
Andrew was breathing heavily, his massive chest rising and falling like a bellows. The thrumming hadn't stopped. It was a low, constant vibration he could feel in his teeth. "Shoes," he rasped, the word thick. He lifted one massive foot. His size thirteen sneakers, usually snug, were visibly straining. The laces were taut to bursting. "They felt tight... earlier."
Steven stared at the shoe. The fabric was stretched thin over the bridge of Andrew's foot, the toe box bulging. "Try… try standing balanced," Steven mumbled, a fresh wave of dread washing over him. Andrew shifted his weight. The worn canvas seam along the outer edge of the shoe gave a sharp, definitive riiip. A jagged tear opened, revealing the swollen flesh beneath. The thrumming pulsed through Andrew’s frame, a relentless, terrifying engine. Steven looked up, meeting Andrew’s horrified gaze. "Size fifteen," he whispered. "Minimum."