High-Leg Little Sister

My little sister Kim Jiwon was the second person to fall under hypnosis after Mom. One might think the order doesn't matter much, but in a world where over eight billion people are already hypnotized, it's a monumental record in its own right. People even play ranking games in internet posts, after all.

She used to ignore and despise her incompetent older brother, but after thorough conditioning, she couldn't even whimper anymore—she obeyed him absolutely. Sure, she occasionally tried to act bratty like a tsundere, but she knew her limits. She never crossed lines that would truly anger him.

Her most notable hypnoses were the "Scent Fetish" that made her aroused by her brother's smell and the "Incest Barrier" that ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠left her unable to feel desire for anyone else. Thanks to that, despite being a blooming 23-year-old, a top student at a prestigious university, and beautiful enough to get scouted on the street for magazines, she had zero boyfriends. Her friends envied all the hunting she got, but to Jiwon, it was pure torture.

Handsome guys that others fawned over looked like disgusting cockroaches or dung beetles to her because of the hypnosis. So when some guy approached with, "I've been watching you—you're totally my type. Mind giving me your number?" it creeped her out as much as a cockroach crawling up saying it liked her.

That's how Kim Jiwon, loaded with every trait that should've made her insanely popular with guys, ended up with zero dating experience. Not even a guy friend. But that didn't bother her much. The real problem was her brother ignoring her lately. She wished he'd hold her instead of wandering around brainwashing new girls, but he'd totally forgotten her, off playing with those weird Sentai chicks. Mom still hugged her sometimes, but forgetting your little sister? She knew the whole world was her brother's toy, and she was just one of them, but lately, she couldn't shake the urge to just take him once.

One day, sneaking into his room to steal his panties, Jiwon stumbled on his phone and swiped it—the one with the Hypnosis App installed.

"So that's how you use it."

Up all night fiddling with the phone, she'd figured out the basics. It wasn't that hard. Shockingly, this little device held personal info on countless people, letting her tweak them all. Like editing game character profiles—but for real live humans.

"With this, I could make slaves out of people just like Oppa?"

Jiwon murmured her overambitious dream through bloodshot eyes. She was way past class time, but who cared? University was nothing. She had no plans to job-hunt anyway—why bother when her brother was a god? Pleasing him beat any corporate gig by a million times.

But... what if instead of fawning over him, ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠she became him?

"Hey, Kim Jiwon! What time is it—you still not up? Oppa already left!"

"Oppa left? Where to?"

"To lick Erika's armpits, he said. Oppa's so diligent, but what's your deal?"

It was hilarious. Mom comparing brother and sister, scolding one—it was an old habit. Back then, she'd praise the daughter at the elite uni and nag the freeloading son. Made sense with a star student daughter and a layabout son.

But now it was flipped—Jiwon was the lazy one getting chewed out. All thanks to hypnosis.

"That Erika—is she the Rainbow Girls idol Erika?"

"Oh, you know her? Yeah, she begged to meet Hoyoung, so he's on his way."

Idols begging to meet him? Oppa was the best. But with this app... I could too.

"Huh? Wait, that phone—isn't that Hoyoung's?"

Mom's face darkened. She glared like Jiwon was a national traitor, not her daughter.

"Gimme that—it looks like Hoyoung's phone!"

"No way."

Jiwon hid it like a middle-schooler caught smoking. She secretly searched Kim Hea-e.

"Hey, Kim Jiwon! That's Hoyoung's phone—hand it over! Now!"

Kim Hea-e swung mercilessly at her resisting daughter's head—pow, pow!—resorting to brute force. For her son, she could discard her daughter without a second thought.

Jiwon tweaked the phone, adding a new hypnosis.

"Stop it, Mom!"

"Ah... yes, yes. I'll stop."

'???'

Even with question marks popping in her head, Kim Hea-e halted the beating.

'What is this feeling? It's just like when Hoyoung commands me... No way, Jiwon...?'

Obeying her son was fine, but if her daughter pulled the same crap? She'd lose her mind.

"Jiwon, don't tell me... you're controlling me with the Hypnosis App? You won't be forgiven for—"

"Shut your mouth."

"……"

"Attention!"

Like a perfectly trained soldier, Kim Hea-e snapped to attention. Flawless—no excess movement.

As her body moved on its own, she grasped exactly what her daughter was doing.

"You're insane. You think Hoyoung will let that slide?"

"With this, I'm no different from Oppa. What's ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠to fear? Hell, I could even hypnotize him instead... Yeah!"

A brilliant idea flashed through her mind.

"I'll hypnotize Oppa! Make him... make him love me. Make him crave sex only with me! And we'll fuck like rabbits every day!"

"Hypnotize Hoyoung...?"

To Kim Hea-e, it was blasphemy that made her want to wash her ears. She was ashamed she hadn't slit Jiwon's throat yet.

"What, you think I can't?"

"You know Hoyoung is this world's god. Defying a god..."

"In a spot like this, Oppa would say: 'Mom. Strip.'"

"...Kuh!"

She didn't want to obey, but her hands stripped anyway. Trembling with humiliation, Kim Hea-e bared her naked body to her daughter.

"Pretty. Big tits, slim waist, plump ass. All thanks to Oppa's hypnosis reverting you to your prime, huh?"

"...So what."

"What? Getting sassy. From now on, use formal speech with me."

"……."

"Answer me."

"Understood..."

"Lick my toes."

"Yes..."

She licked her daughter's toes. The stench assaulted her nose, humiliation crushed her chest. But her tongue diligently savored Jiwon's toes.

Resisting hypnosis was impossible. She knew that all too well.

"I'll stick my toe in your pussy, so bring it here."

"Understood."

Her pussy, off-limits to anyone but her son. Kim Hea-e's body had been rejuvenated to early twenties by him, all memories of other men erased. No husband memories either. Mentally and physically, only her son had ever touched it—that was her pride.

Now it was being defiled.

"Ah... Lady Jiwon, please stop."

"Quiet, I said."

Her big toe slid in. It wriggled playfully inside like splashing water. Jiwon frowned—unexpectedly dry. Oppa made both of us soak instantly, so why...?

"Mom. Doesn't my toe feel good?"

"It doesn't feel good."

"Say it feels good."

"It feels good..."

Wasn't quite like Oppa. But Mom's absolute obedience was solid. Good enough.

"With this app, after you, I'll hypnotize Oppa. Hehe. Then the world's mine!"

"……….."

Kim Hea-e said nothing now, biting her lip and swallowing her words.

'When Hoyoung gets back, you're done, idiot. No way you beat him.'

Just then, gardener Seo Jeonghui's ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠welcoming greeting for the master echoed from outside. Jiwon's heart pounded with excitement and tension.

"Hoyoung's finally back. You're finished, Lady Jiwon."

"Sh-shut up! Oppa's mine now too!"

Honestly, I had no clue about my little sister's mini-rebellion that day. Or that Mom was desperately waiting for me to save her.

I only noticed my phone was gone when I reached for it to snap Erika's armpit pics and found my pocket empty. That's it.

So when Jiwon came charging to the entrance with a fierce glare, holding my phone, I had no idea she was plotting to enslave me.

"Oppa! Now you'll obey me like Mom!"

"What? Oh, you're back. That's my phone—give it."

"Huh? Ah... yeah."

With a dumb look, she meekly handed over the one tool that could've let her use hypnosis.

Her pathetic revolt ended that lamely. I heard the full story from Mom, found naked in Jiwon's room.

"Ho. Tried to rule the world in my place?"

"O-Oppa, that's not—"

"Can't just let it slide. Gotta get proper atonement."

"I-I'm sorry, Oppa! As many times as you want... hundreds!"

"Got a fun idea."

Inspired by a childhood anime. I had Mom fetch a high-leg swimsuit and made Jiwon wear it.

"No taking it off till you've shouted 'High-Leg' a million times in atonement pose."

"High-leg! High-leg! What the hell! High-leg! Sorry, Oppa! I won't mess around again, forgive me—hiiik! High-leg! Ugh! Every high-leg makes my pussy clench...! What is thiiiis! High-leg! High-leg!"

With legs splayed bow-legged, knees bent, hands sliding from thighs to pussy and back—the high-leg pose—repeated a million times as atonement.

After the millionth, Jiwon collapsed in a sweaty puddle on the floor, muttering one last thing before passing out.

"Never... messing with Oppa again... high-leg..."