After Practice
Disclaimer: This is a fictional, gay erotic transformation story intended for 18+ audiences only. All characters are 18+, fully consenting, and the content includes intense physical changes, dom/sub reversal, and breeding kink.
Lucas tossed his towel aside, stretching in front of the mirror as steam filled the empty locker room.
He was dripping sweat and pool water—his muscles taut, his veins raised from the last two hours of relentless laps. Star swimmer. Captain. Alpha.
He smirked at his own reflection.
Lucas (grinning):
“Still got it.”
But then, his eye caught a black bottle sitting right on the bench in front of his locker.
No label. Just a tag hanging off it:
“Lucas — Serum 69X. You’ve earned it.”
He chuckled.
Lucas:
“What is this, some recovery bullshit from Coach?”
He popped the lid. The liquid inside shimmered unnaturally—almost alive.
Thick. Iridescent blue. Like electric honey.
He took a swig.
It hit instantly.
Lucas gasped, doubling over.
Lucas:
“F-f*ck—what the—my chest—my cock—nghhh—!!”
His abs throbbed, muscles pulsing outward with every heartbeat.
His pecs inflated, tighter than ever, harder.
His arms cracked—biceps ballooning into veined, twitching meat.
But it was his cock that truly betrayed him.
It shot upright like a steel tower.
Longer. Thicker. Dripping clear liquid in massive beads.
He looked down—eyes wide.
Lucas:
“That’s not f*cking normal…”
But his hole started twitching too.
A sensation he’d never felt before.
Deep. Electric. Need pulsing between his cheeks. A heat that had nothing to do with the sauna.
Lucas (shaking):
“Oh, f*ck me—why do I feel like—I need—”
---
🚪 Door creaks open
Lucas barely had time to turn when he heard the door swing open.
Jayden walked in.
The soft, nerdy freshman. Bookish, quiet, always in the library.
Towel around his waist. Headphones in. Looking up—
And freezing.
Jayden (eyes wide):
“Lucas? Dude… what the hell happened to you?”
Lucas was leaning against the bench, one hand gripping the edge, the other holding his painfully hard cock. Muscles twitching. Sweat and precum dripping. Eyes half-rolled back.
Lucas (gasping):
“D-don’t know—some bottle—took it—now I—I need—”
Jayden (stepping closer):
“Need… what?”
Lucas (voice desperate, raw):
“Something… anything—I feel like I’ll explode if I don’t—PLEASE—touch me—!”
---
🧠 Jayden Flips
Something changed in Jayden.
He wasn’t the soft boy anymore.
His shoulders squared. Eyes darkened.
He dropped his towel.
His cock was already hard. Big. Unexpectedly big.
Jayden:
“You always acted like you were above everyone, Lucas.”
Jayden (stepping closer, stroking himself):
“Now you’re leaking and begging like a bitch in heat.”
Lucas (gasping, bending slightly):
“Shut up… just—just f*ck me already!”
Jayden didn’t hesitate.
He shoved Lucas forward over the bench, grabbed his swollen hips, and lined up behind him.
---
💦 The First Insertion
Lucas moaned—loud.
When Jayden pushed in, it was like a switch was thrown.
Lucas arched his back, gasping like a porn star in heat.
Lucas:
“HHNNGGHHH—OH—GOD—THAT’S—SO—F*CKING GOOD—!”
His hole was sucking Jayden in like it had waited for this.
Jayden slammed in deeper, grunting.
Jayden:
“You like that, huh? Alpha boy begging to get bred.”
Lucas (slurring):
“Yes—yes—don’t stop—I’ll die if you stop—please breed me—please—fill me—!!”
Jayden growled.
Started f*cking harder.
Lucas’s body trembled. Muscles spasming. Cock drooling uncontrollably onto the floor.
Lucas screamed—
His cock twitched and erupted without being touched, thick streams shooting as Jayden slammed deeper, balls slapping against Lucas’s tender skin.
Jayden:
“Take it, slut.”
He came inside, thick, hot, heavy.
Lucas collapsed, twitching, breathing like a beast.
Lucas (whispering, smiling):
“God… yes… again… again…”
