Big Sister Cherishes Her Little Sister
After thoroughly cleaning up BB in the motel bathroom, Yoon Seoha let out a breath and stepped outside.
Warm sunlight bathed her, accompanied by a refreshing breeze.
"Summer's almost here, huh."
Gazing at the leaves turning green, the thought suddenly crossed her mind.
"Come to think of it, how long has it been since I was out like this?"
Who knew.
She'd only started venturing outside about a week ago, after all.
"First things first... Big Sis. Yeah, I need to see her. BB can find her own way back."
Yoon Seoha closed her eyes for a moment and steadied her breathing.
Her feet wouldn't move. She knew she had to, but they stayed rooted.
Does she hate it?
Maybe some remnant of the old boy inside her was holding her back.
Pfft. Yoon Seoha let out a small chuckle.
It was ridiculous. She'd declared she'd go show her transformed self to her sister, fuck her senseless—and now that it was time, she was hesitating.
Pathetic.
She'd chosen the easy path over the hard one; now she had to walk it straight.
"Come to think of it, were Big Sis's tits always that huge?"
Last time she'd seen them, they were flat as a board.
"Well, she was still growing back then."
She could've developed after hitting adulthood.
Besides, it had been years since she'd really looked at her sister properly.
All she'd heard lately was her voice. Her mental image was frozen at that outdated version from years ago.
"Big Sis hasn't changed much."
Her chest had ballooned, sure—but her face was the same. The way she smiled, those little habits when she talked.
Steadying her breath, Yoon Seoha stepped forward.
She walked the quiet weekday morning streets, inhaling and exhaling deeply over and over.
The closer she got to her sister's gym, the faster her heart pounded.
After a while, her phone chimed with a ding.
"Manager Do?"
It was a message from Do Yoonseo, saved in her contacts.
She'd sent a link to yesterday's upload—Yoon Seoha's debut with the Jang mother-daughter duo. The purchase count on Futanari Corporation's site had broken 1 million.
"Second place... Pfft. What the hell."
Yoon Seoha burst into light laughter.
She never imagined she'd have talent for this.
1 million. Not views—actual buys.
That many people, members or not, had permanently owned her debut vid.
Embarrassing, sure. Her cheeks burned. But the joy outweighed it.
For the first time, she'd accomplished something real.
"A personal onahole..."
Murmuring to herself as she walked, Yoon Seoha continued.
"If I do..."
A dark smile played on her lips.
⁎ ⁎ ⁎
The gym was deserted on a weekday morning.
Most members were adults, so it only got busy in the afternoons or late nights.
There were younger ones, but no break yet—they were all in school.
So Yoon Seoyoon was alone, filming her workout vid.
"Hm?"
The glass door jingled open.
In walked a stunning woman in a suit, her black hair in a low ponytail. Towering a head above her, with model-crushing proportions.
"H-Hey, what brings y—"
Stopping mid-set, Yoon Seoyoon approached—then her eyes widened.
Suspicion turned to certainty, then shock. And at the end of that shock... a flicker of unspoken lust.
"C-Could it be..."
Her voice trembled.
Ignoring it, the woman fixed her beautiful brown eyes on her.
Just like her little sister's.
"...Seoha?"
"...Hey. ...B-Big Sis."
"Heh...♥"
"?"
A wicked smile curled Yoon Seoyoon's lips. Trembling, she approached the woman—Seoha.
A familiar scent tickled her nose. The nostalgic fragrance she'd always known.
"I-It really is you, Seoha..."
"...You believe me?"
"Of course. Breast enlargement pills exist—why not ones that turn you into a girl?"
"...Breast enlargement pills?"
"You think tits grow two cups overnight?"
Yoon Seoha rolled her eyes at the words, then let out a short gasp.
"Fair point. That flat board."
"Y-You, what did you just—?!"

"Sis! No, Big Sis? Whatever! Calling your sister a flat board...! Wh-What the...♥"
Flushing red, Yoon Seoyoon yelled.
Yet she crossed her legs tight, breathing ragged and lewd.
"D-Don't do this here. Let's go somewhere else and talk slow. Yeah?"
"Sure. Let's."
"Hehe... Seoha, my little sis..."
"Yeah, Big Sis."
"Haaah...♥"
Her eyes dripped hearts as she gazed at her bigger little sister.
Grabbing her hand, she followed.
"No wonder shota stuff wasn't doing it for me... This is why..."
Muttering nonsense Seoha couldn't parse, she trailed behind.
"...Uh, Seoha?"
"Yeah? What's up, Big Sis."
"Th-This place... Isn't it kinda far from 'talking'?"
"What're you on about."
Where else was better for a chat?
Yoon Seoha grinned.
At her words, Yoon Seoyoon looked up again at the building.
[H-Motel]
The name's already sus.
"N-No, let's not. Yeah? Cafe nearby or... Huh?"
"Where to?"
"Wait, just... So strong...?!"
Yoon Seoyoon yanked with all her might—but Seoha just smiled down at her struggling sister.
The once-intimidating Big Sis now dangled helplessly from one hand, grunting.
Snickering, Yoon Seoha dragged her upstairs.
Into the room, lock clicked, shoved her toward the bed.
"S-Seoha."
"Yeah?"
"Calm down."
Yoon Seoyoon looked up at her.
"G-Girls doing this is weird too, right? Yeah?"
"Doing what? What's 'this'?"
"...Huh?"
"What're you thinking, perv."
Seoha's sweet voice pierced straight to her brain.
A melting whisper tailored to her flipped tastes. Something unbreakable shattered—legs went limp.
"Uh...?"
She slumped to the floor. Hot fluid gushed between her thighs.
Not piss—clear, sticky nectar.
"Hopeless perv, huh, Big Sis."
Yoon Seoha sat in the bedside chair.
"Anyway, 'girls together'?"
She beckoned Seoyoon closer. Legs weak, pussy dripping, she crawled over—shivering at the hand stroking her hair.
"Mmm, you just don't know, Big Sis. Comparing to those inferior toys is an insult."
"Uh, yeah?"
"Strip."
"..."
"Now."
"...Y-Yeah."
Obeying, Seoyoon peeled off pants and panties.
"Eek...♥"
Revealed: a massive cock.
Forearm-thick monster.
"Wh-What? Huh?!"

"H-Hiiik♥ Hiiiiiik♥"
A dopey grin split Yoon Seoyoon's face, eyes glazing over.
Against expectations, she rubbed it on her cheek, drooling rivers.
"Wh-What is this? How many cm?!"
Ignoring Seoha's thoughts, she kept mumbling.
Palm wrapping the shaft, roughly gauging length—eyes brimming pure love.
"3...1.4 cm. 31.4? You were 14.9 originally... Rounded to 15, so about double? Hehe."
"How do you even know that."
"Hehehm. Ways exist...♥"
Yoon Seoyoon stared hungrily at the cock as she answered.