Let Me Introduce Myself

Let me introduce myself.

Alright. First up — this bitch's name.

Lee Ji-yeon.

A fresh-faced twenty-something. Distinguishing feature: she's gorgeous. She's my little sister, and she is fucking gorgeous. Glossy black hair that spills all the way down to her chest. A hundred and sixty-six centimeters tall. And her tits — Christ, they look like a D-cup already, and she swears they're still growing.

That dairy cow of a girl.

The height and the ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠figure would already be cheating, but her grades are excellent too. A goddamn genetic jackpot dumped on one person. And she's popular. Of course she is. She didn't even bomb the Suneung — scored well enough to get into the school she actually wanted — and now she's living it up like a horse that's chewed through the reins, loafing around and treating my wallet like her personal ATM.

That fucking bitch.

And me. Yeah. My name.

Don't you dare laugh when you hear it. I'm warning you.

Lee Ji-eun.

Fuck.

That's right. That's my name.

Look, I have an excuse. The first time my parents went in for an ultrasound, I came back as a girl. My uncle heard the news, hunted down a famous shaman, and dropped what little money he had on a name. Lee Ji-eun. And then I came out. With a dick.

They'd already paid a fortune for it, so they never changed it. Thanks to that, I got roasted for my name without a single gap — elementary, middle, high school, the full tour. At least I had a decent face. Small mercies.

God. The PTSD.

There was other stuff they teased me for too, but I'll get to that later.

I'm a year older than my sister. I was a retake student, but I'm an incoming freshman now — after bleeding myself dry I finally got into the school I wanted. The problem is that she got into the same one. Still. I can build my own schedule. We probably won't run into each other.

Alright. Enough prologue. Let me tell you how my sister and I went so completely off the rails.

We lived in a cramped, falling-apart villa with shit soundproofing. We were still little then, so I shared a room with my sister. Shared a blanket, too — stuck together, skin to skin. The heat never worked. It was freezing.

School. That same poverty took a bite out of our education. You already know elementary and middle school are mandatory. Our family was just too broke. Our parents couldn't put us in right away — some kind of conditional deferred enrollment, I think? I started elementary two years later than everyone else. My sister started one year late.

Even so, back then that girl — no, my sister, Ji-yeon — and I were close. The kind of close where you can't live without each other. We bathed together. We followed each other everywhere. We stood out a little at school because of it, but my friends never really cared.

Anyway. Adolescence was coming up on us, and our family's situation was finally starting to improve.

The problem was...

Once we started growing up, we weren't supposed to keep washing together.

We'd stripped down like always and were fooling around, soaping each other up, when—

My sister was nineteen.

That perfectly natural phenomenon had arrived later for her than it had for most girls her age. I don't know if it was genetic, but it still hit her before it hit me. She shot up taller than I was. Her chest started swelling, little by little, and fine hair began to bloom between her legs.

"Why are you getting bigger than me? I'm the older one...!!"

"Heehee!! That just means Oppa's still a little kid~"

Unlike her, I didn't even have hair on my dick yet. Watching my sister grow at this insane, day-by-day pace made me so jealous I could taste it. Puberty would come for me too, of course — a few months later I'd hit my own explosive growth spurt — but in that moment, all I could feel was this ugly little fear that my grown-up sister would start looking down on me. Jealousy. Something like that.

That day we were messing around like always, tossing that same teasing back and forth, giggling at each other.

"Alright, alright~ Come here. I'll wash you..."

"Heehee...! Oppaa~ ...are you sulking? I won't tease you anymore, so cheer up~"

"...I'm not sulking. Arms up."

"Arms uup~!"

Her body had grown, but she was still a kid. A little irritated, I squeezed out a long ribbon of body wash, worked it into a lather, and started rubbing it over her skin. Lately, though, something about my sister had been off.

"Nnh…! ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠Haaah… nngh!"

"...??? Why do you keep doing that? You're not hurt, are you??"

"I-I'm not…! Keep going, Oppa... haah..!"

"…Tell me if it hurts."

I ran my hands over her chest — bigger than it used to be — with real care, working the lather all the way to her nipples.

"Haaah…! Nnh! ..there… wipe it cleaner…! Oppa…!"

Her growing breasts had started hurting her out of nowhere these past few weeks, so whenever I touched them I treated her like a baby — precise, delicate, barely any pressure. I remembered how even a light touch used to make her wince. It seemed better now, which was a relief. What I couldn't figure out was why she kept making those sounds, why her breathing had gone so ragged. I was a little worried she was actually in pain. But she'd said nothing was wrong. So it was probably fine… right?

"Hnnngh…!! Nngh!!!"

Lately, whenever I spent this much time on her chest, there would come a moment when her whole body twitched and a tremor ran through her. She'd told me it was nothing and not to worry about it. That only made it more frustrating.

After I finished with her chest I rubbed along her underarms, and she burst out giggling and threw her arms around me, squirming like it tickled.

"Hieee! Heehee…!! Stop the armpits already! If you don't stop I won't let gooo! Khh…heehee!!"

"Ack!! ...I surrender…!! Let go!"

And of course now she was ridiculously strong. My face was mashed somewhere around her throat when she suddenly crushed me tighter and started rubbing her soapy breasts against me, using the body-wash foam still clinging to her skin.

"Now I'll wash yooou…! Aang! ..so slippery~ it feels so nice… ..haaang…♥"

"Ugh.. I can't breathe…!!"

Pinned like that, my arms were trapped pointing ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠down — and something scratchy and faintly prickly kept brushing my palm. I rubbed at it without thinking.

"Hwaang~!!"

"What's wrong!?"

"I-it's nothing… ahh..!"

Ah. Pubic hair. Huh. The more I rubbed, the more addictive the texture got.

Pressed flush against her, I kept stroking, enjoying the feel of it. For some reason my sister's face was getting redder and redder.

"Hm…?? What's this?"

"Ahn…!"

Under the hair, something small was sticking out. A little bud. Is this the same kind of thing as a nipple? I thought, and rubbed it carefully, delicately.

"Haaaah… nngh… Oppa, uuu… I think I feel weird…"

?

She'd stopped the rubbing. She was panting, mumbling something I couldn't quite catch. Nothing important, apparently. I left her to it and, without a thought in my head, went on stroking that little protruding bud — sometimes rubbing gently, sometimes giving it a firmer pinch — fascinated by the way it seemed to swell under my fingers.

"Hwaaah…!! Nnh! Khhnn…!! Hnnh!!"

All of a sudden she started rolling her hips against my fingers, pushing down like she wanted that strong stimulation even harder. I was startled, but I figured it was some new game of hers, so I pressed more firmly and kept rubbing.

"Oppaaa…!!! This feels so gooood…! Don't stop! ..haah! Haaa…!! Aang…♥"

"..Something keeps coming out from inside. Does it feel good if I keep touching it…?"

"Yesss~!! That's right…! Because Oppa's touching me…!! It feels so good on the inside... water keeps ..coming ouuut…♥"

"Really?? Better than when I touch your chest…??"

"Haaaa…! Yeah! Better than my chest… this feels so much betteeer…!! Touch it every day… nnh!"

Watching my little sister light up like that, I rubbed harder, touched her more, and felt a strange, warm sense of accomplishment. At the same time, a faint, unplaceable pleasure rolled through me — and something else, something a little wrong, that I didn't have a name for.

Spurt—! Spurt! Fwoosh—!

"Haaaah…!! Ahn! ...kh!! Aaaaah…"

"You're okay, right..?"

Her pussy clenched without warning and a violent jet of fluid burst out of her, gushing in wild, shuddering pulses. Her body tipped backward. Her eyes rolled up. Drool spilled from the corner of her mouth. She made sounds I couldn't even parse, gasping like she couldn't find air — and I froze, terrified. She'd just collapsed. I was so shaken I could barely think.

I hauled her up, carried her out of the bathroom, and kept asking if she was okay with my voice going thick, on the edge of tears.

"Haaah…. I'm really okay, Oppaa~ Put the phone down. I'm seriously fine~"

"O-okay… But we should tell Mom and Dad. I think we need to go to the hospital.."

"Don't you dare… tell Mom and Dad."

I kept pushing. Her whole face changed. She shut me down cold.

I was so stupidly innocent back then.

All I felt was jealousy over how fast that girl was growing, and the first little spark of curiosity about a woman's body. I made such a scene, convinced something was actually wrong with her. If she hadn't gone dead serious and stopped me, I really would have called 911.

Ah... fuck.

If I'd figured it out even a little sooner — would I have put some distance between us? I regretted it, a little.

And from that day on, that girl started to change. For real.

In a very, very bad direction.