A Kind of Evolution
"Seoha."
"...Yeah?"
"Are you awake?"
"Yeah..."
Yoon Seoha.
A name that was somewhat—or a lot—like a little girl's.
She thought it childish now, but back in elementary school, a boy with a name like that had been prime teasing material.
Looking back, it hadn't been outright bullying. Just laughs and chatter about the name—no real harassment.
But even that had been enough to make life hell.
She'd holed up at home, ditching school and everyday life to hide.
Dad on a long overseas business trip, Mom swamped with police work, big sis the fitness YouTuber.
Thankfully, they loved their youngest—
"Mom's heading to work now. You know it's a business trip starting today, right?"
"Yeah. And sis...?"
"She already left for the gym. I made food—warm it up in the microwave. You can handle that, right?"
"Yeah..."
"Good. Mom believes in you, Seoha."
—and they could still have moments like this.
...Sleepy.
The front door clicked shut.
She dragged herself out of her trashed room—littered with tissues, garbage, and haphazardly shed clothes—into the bright light.
"Ugh..."
Squinting, she shuffled toward the dining table, steps unsteady.
"Ah... I should wash up first."
On the table: small pills that looked like supplements, and covered bowls of rice, soup, and sides. They didn't have to fuss this much; all it did was make her uncomfortable...
...Anxious.
How long could this life last?
Would it snap tomorrow, like a taut thread snipped with scissors? She feared this fragile peace vanishing.
She entered the bathroom and faced the mirror.
Late 160s in height, bony, scrawny. Choppy black hair, brown eyes. Skin pale from zero sunlight.
Her hair wasn't greasy but had dried out overnight; she splashed it with water.
Warm water steamed up the sealed bathroom in moments.
"Bored."
She brushed her teeth, washed her face, shampooed, scrubbed down.
Never went out, but always kept clean.
No one to meet, yet she replied politely to every text.
"So bored."
Opening the door let steam billow through the house.
She toweled off, changed, and sat at the table.
"...Thanks for the food."
She ate, swallowed the supplements...
And slept again.
Her body burned.
Feverish, aching, and...
"...What the hell?"
"What's this...?"
The heat and needle-like stabs in her chest faded.
"No, seriously, what?!"
Her clothes felt tight—maybe imagination?
No, not imagination.
The tank top that had been baggy—even a bit loose before bed—was now squeezing like a too-small crop top. Her panties strained but held. And that heavy weight between her legs.
The supplements... denying it would be weirder.
Yoon Seoha sighed, sitting up.
"...So tall now..."
Easily over 180cm. Dazed by the new height, she headed to the bathroom, slowly inspecting her body.
She stared at her reflection.
Still echoes of her old male face, but softer, more feminine. Black hair cascading to her waist, brown eyes.
Toned muscles lent healthy allure; moderate breasts swayed just right, feminine without hindrance.
And finally.
Her gaze dropped to the massive thing between her legs.
"Futanari... right?"
Futanari.
The pinnacle of humanity's science: a perfect new gender blending woman's assets with man's.
She'd never dreamed she'd become one.
"...Doubled at least."
Her dick—once decent, snake-like—had become a full dragon.
Veins pulsing proudly. Unable to look away from its hypnotic allure, she reached out tentatively.
"Oh fu—♥"
Her upgraded futanari body: senses hyper-sharpened. A mere touch struck her brain like lightning.
"Hah, heek?!"
Every graze made her hips buck. Brain-melting pleasure—nothing like her male days.
"Kuh, hiiik?! Kuhoooook♥"
Realizing human flesh could be this sensitive, she lost herself in masturbation.
Pussy juices dripped; thick precum oozed from her huge glans.
Hours? Minutes? Time blurred—her mind was mush.
To clean sweat, fluids, and precum, she turned on the shower.
"Ah— oguk?!♥"
Water pelted her sensitive tip.
Sweet moans followed.
Brain melting again, she dove back into self-pleasure.
From outside, faint moans mixed with the roaring water.
Beep-beep-beep—the front door unlocked.
"Huh? Seoha?"
"N-Nunnaaa?!"
"What's up with you? Out here at this hour."
"Uh, uhh?"
"It's 5 p.m. Didn't you know?"
Sis had returned from her morning gym and work.
Breakfast, collapse, wake at lunch.
Shower to clean up started at lunch—so 4-5 hours in here.
A-Already that long?
Did the pleasure really shatter her brain? Even with water running, she was filthy with fluids.
The bathroom steamed with lewd fog.
"Gotta head out again. Just grabbing clothes."
"Wh-where to?"
"Business trip. ...Worried leaving you alone."
"Uh, uhh? N-no, it's fine... yeah."
Leaning on the door, Yoon Seoha replied.
"Don't worry, j-just go... yeah."
"...Seoha."
"Y-yeah?"
"You sick? Voice sounds thinner."
At Yoon Seoyoon's words, Seoha coughed loudly.
"Uh, uhh! M-maybe a cold coming on!"
"...Okay. Take care."
"Yeah. Thanks, sis."
"No biggie. Back in about ten days. Call tonight."
"Yeah!"
Footsteps retreated from the bathroom door; the front door shut. Seoha exhaled hugely.
"Whew..."
Heart pounding, mind blanking. Never again.
She rinsed off, wrapped in a bath towel, and emerged.
Watching steam rise, she shook water from her long hair.
"Towel's small... It used to cover me fine."
The once-ample towel now needed doubling; she chuckled wryly, heading to the closet.
"Hope there's something to wear."
Only intact square panties and the shrunken tank top fit.
"...Sis's scent."
Her sharpened nose caught Yoon Seoyoon's body odor.
Just lingering from picking clothes, but it seeped into her brain. Rough breaths escaped.
"...Dangerous. Haha... hot."
It was intoxicating.
A woman's—female's—scent, so alluring.
Seoha pinched her nose, head back. Nosebleed imminent.
Suppressing lust's grip, she fled the closet. Back in her trash-pile room, she slumped laughing softly.
"...Futanari lust is this intense..."
Family scent? Or just female? Unclear. But returning would've been disaster.
Terrified of losing herself to it.
"...That's why those companies exist. Gotta vent somehow, or daily life crumbles..."
Often debated online; even after 100+ years, opinions split on the company.
Seoha had stayed detached. She never went out anyway—personal choice. And legal, so whatever.
"...Huh?"
As thoughts coalesced, an unnoticed object registered in her hand.
"...Huh?"
She stared at the black item.
Black, with a cute tiny white ribbon—
"When did I grab this...?"
—panties.
Her big sis's—no, now her older sister's—Yoon Seoyoon's panties.