68-year-old Harold Thompson locked the door of his small neighborhood sauna inn as always.
The last guest’s footsteps faded, leaving silence in their wake.
As usual, he began meticulously cleaning the sauna room and bath area.
He scrubbed the water stains from the floor, wiped down the benches soaked with sweat, and cleaned every corner of the shower tiles and steam room walls where moisture clung.
Throughout the cleaning, Harold’s gaze naturally drifted toward the bodies of his guests.
Whenever young men came in, he found himself unconsciously glancing at their taut skin, solid muscles, sweat-glistening wide backs, and thick thighs.
Especially when muscular guys stayed long in the sauna, he would mutter to himself,
“Those guys… how much do they work out…?”
That admiration soon turned into envy, and ever so faintly, a strange excitement brushed through him.
But the moment the thought arose, he brushed it aside.
He told himself it was just something he noticed while working, nothing more.
While cleaning, he glanced out the window and saw a familiar face in the training ground outside.
Ethan Brooks.
The little boy who used to follow him shouting “Grandpa!”
Now 23, 176 cm tall, 87 kg of lean muscle, a college athlete.
Harold watched him from the window.
That firm body, sweat-soaked broad back, powerful thighs…
“That kid grew up so much…”
A heat bloomed in his chest. A strange thrill passed through him.
But in an instant, his mind snapped back.
“I must be crazy… completely crazy.”
The very thought of feeling that way toward Ethan, whom he’d treated like his own grandson since childhood, made him shudder with guilt.
He shook his head vigorously and turned away from the window.
After finishing all the cleaning, Harold muttered, “Today I’ll take it slow…” and stepped into the sauna room alone.
He wrapped a single towel around his waist and sat naked on the bench in the steam room.
Warm vapor enveloped his skin, and a sigh escaped naturally.
He closed his eyes and took a deep breath.
In the steam was a very faint, sweet and sticky scent.
Harold didn’t notice it.
He simply murmured, “This really feels good today…”
At first, it was just a slight warmth on the skin.
Wrinkles slowly smoothed out. Age spots on the backs of his hands faded. Fingers gradually thickened, veins began to stand out. His hunched back straightened on its own.
Harold thought to himself,
‘The steam feels especially nice today… my body feels lighter.’
Then his cock reacted first.
What had been about 15 cm slowly, steadily began to swell.
20 cm… 30 cm… 35 cm…
The towel started to bulge upward.
The fabric stretched tight over his thighs, and Harold let out a low breath.
“Uh… what’s this…”
He glanced down at the towel but didn’t pay much attention yet.
He simply thought it was the effect of the warm steam.
When his cock passed 55 cm, the towel could no longer hold.
There was a tearing sound, and the towel naturally slipped down to the floor.
Harold was now completely naked.
His height slowly increased.
A heavy sensation ran through his bones as they lengthened.
His buttocks swelled heavily, spreading wider on the bench.
His back widened so much it nearly touched both walls of the sauna room.
His cock rose past 80 cm, surging upward beyond his head.
The shaft thickened further, veins bulging prominently.
The glans swelled to the size of two large fists.
His balls, once the size of fists, grew steadily until each was the size of a soccer ball, pressing heavily against his thighs.
Harold looked into the mirror.
“This… is me…?”
His voice trembled.
The sensation of muscles inflating, the weight of growing taller, and the sight of his own cock towering above his head sent a near-orgasmic wave of pleasure through him.
He reached out and touched his own chest muscle.
The firm, hot texture made him shiver.
His hand naturally slid downward and gripped his cock.
“Haa… this body… feels too good…”
He lifted his arm.
His bicep had swollen thicker than most men’s thighs.
“This… this is my arm…?”
Excitement surged through him.
He brought the arm close to his face and began licking the bicep with his tongue.
“Hnng… slurp… slurp slurp… so good… this power… this size…”
Every stroke of his tongue against the muscle sent tremors through his body.
The overwhelming sense of superiority from his own transformed physique set his entire being ablaze.
The sauna room grew increasingly cramped and stifling.
Harold, already consumed by uncontrollable desire, began pleasuring himself.
He hugged the massive cock against his chest and pumped it furiously.
Every time he shook the log-like shaft, pre-cum poured out endlessly, mixing with the precum already leaking, making his hands and the thick shaft produce wet, squelching sounds with each stroke.
“Haaah… so good… it keeps coming out… more precum… ughhh…!”
Little by little, semen and pre-cum already leaked with each movement.
The closer he got to climax, the more violently it surged.
Each orgasm erupted like a waterfall, far more than the previous one.
The sealed, narrow sauna room quickly filled—cum pooling at his ankles, sloshing with every shift of his weight.
“Uwaaa… still… not enough… harder… harder…!”
He groaned lowly, hands never stopping.
Even after several climaxes, the desire didn’t fade.
“Haa… kuhhh… this body… it’s driving me insane…”
After about 10 minutes, his entire body finally solidified into perfect, dense muscle.
His weight approached 320 kg, making the bench creak dangerously.
His cock now towered fully above his head, throbbing and dripping pre-cum onto the floor with every heartbeat.
The sauna room had become unbearably tight and suffocating.
Harold realized he could no longer stay seated inside.
He opened the door.
In that instant, the enormous volume of cum that had been trapped inside the sealed room poured out like a flood, covering the bathhouse floor in white.
The thick liquid flowed like water, making the tiles slippery, and the potent scent spread throughout the bath area.
Harold stepped into the bathhouse and leaned against the edge of the tub.
Unable to hold back the overwhelming desire, he gripped his cock again.
He pumped the 108 cm monster furiously with both hands.
“Hnng… haa… this body… this power… it’s all mine now…”
With every climax, liters upon liters of cum cascaded like a waterfall, coating the bathwater white.
The surface turned milky, then completely opaque as the pool became a thick white semen bath.
At that moment, the door from the changing room opened quietly.
Ethan Brooks (23) had come to return an old exercise tool he had borrowed from his grandfather, and finding the door unlocked, stepped inside.
Passing through the changing area and hallway, he reached the bath entrance—and froze.
There, in the middle of the milky semen-filled bath, was his transformed grandfather, furiously stroking his towering cock in a trance of pleasure.
Ethan’s mind shattered in an instant.
At first, pure shock and fear locked his body in place.
But soon the overwhelming physique, the endless gushing torrents of cum, the thick semen scent filling the entire bath area pinned his gaze in place.
His own 17 cm cock hardened painfully inside his pants. His legs trembled. He felt himself teetering on the edge of orgasm just from watching.
Fear and confusion tangled together, yet awe and a strange desire surged within him.
Ethan stood frozen, panting, unable to run or approach, simply staring in helpless voyeurism.
Harold, completely lost in the ecstasy of his transformed body and limitless virility, never noticed Ethan at all.
His vision and mind were filled only with his own monstrous flesh and the waves of pleasure pouring out.
When Harold finally unleashed one last colossal ejaculation, turning the entire bath into a pure white semen pool, Ethan shuddered violently and let out a stifled moan.
He looked down at his own arms and chest.
Somehow, at some point, his muscles felt slightly denser, slightly more swollen.
But he couldn’t fully register the change—his mind was drowned in arousal that refused to fade. His legs shook. His cock remained rock-hard.
Ethan stared at Harold with eyes full of confusion and desire, unable to close the door behind him.
The sauna remained silent,
but this place was no longer just a sauna.
Harold submerged himself in the semen bath, feeling his new body, and let out a low chuckle.
Ethan, watching that laugh, felt an inexplicable tremor run through him.
(To be continued…)
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Harold Thompson’s SpecsBefore Transformation
Height: 171 cm
Weight: 62 kg
Build: Thin, frail, elderly, hunched posture, wrinkled skin, sagging chest, no muscle definition
After Transformation
Height: 198 cm
Weight: ~320 kg (pure muscle)
Build: Extremely muscular, broad shoulders, thick chest plates, powerful back, massive thighs and glutes, overall hyper-masculine and superhuman physique
Cock: Fully erect length 108 cm, shaft extremely thick (veins bulging, hands can’t fully wrap around), glans larger than two large fists
Balls: Each the size of a soccer ball, hanging heavily and slapping against thighs
Ethan Brooks’s Specs
Height: 176 cm
Weight: 87 kg
Build: Athletic, muscular college athlete
Cock: 17 cm