The Sister's Obsession
“Se-hee, do you like this? Eat a lot.”
Mom kept using her chopsticks to scoop up the side dishes and place them on Se-hee’s bowl.
But nothing landed on my bowl.
Honestly, I felt a little hurt.
I wanted to throw a childish tantrum and say, “You should give some to me too.”
Quietly eating my rice, I set down my empty bowl and subtly checked the atmosphere.
Want to score a few points?
“Mom, I’ll do the dishes this morning.”
“Oh, really? Thanks, our daughter.”
Mom smiled brightly.
Just like that, my heart melted.
After the meal, I started the dishes.
Meanwhile, the living room sofa was filled with a warm, lively atmosphere.
“Why is that celebrity acting like that again?”
“Yeah, Se-hee, eat more fruit.”
Normally, Se-hee would just eat her rice and go to her room, but today she was sitting in the living room with Mom and Dad, watching TV and chatting.
A cozy time for the three of them.
I felt like I was the only one left out.
…Why is there so much to wash today?
After barely finishing the dishes, I showered and came out.
With a towel on my head, I entered my room.
While applying lotion to my face, the door opened and Se-hee came in.
“Unnie, who are you meeting today?”
“Ah, my friends.”
“Who are your friends?”
“Ji-eun, Su-jin, Na-yeon.”
“What are you wearing?”
“Just anything…?”
Normally, I don’t bother with makeup.
I prefer comfortable loungewear.
Se-hee walked to the closet.
She opened the door, rummaged for a bit, and pulled out a sky-blue one-piece dress.
It was a dress she didn’t wear because it was too short.
“Wear this.”
“Eh? It’s a bit short…”
“Wear this.”
With a firm tone.
“…Okay, whatever.”
It was short, but I couldn’t not wear it.
I was about to change when Se-hee spoke again.
“Don’t wear panties.”
“Eh, huh? Why?”
Se-hee’s brows furrowed.
“Why are you always making excuses?”
“……”
Scary.
But why tell me not to wear panties.
With such a short skirt.
What if it’s seen!
Clearly harassment.
Abuse, even.
I wanted to refuse, but seeing Se-hee’s cold expression, my mouth wouldn’t open.
“…Okay.”
Even after answering, I felt a bit stupid.
An unnie who fears her little sister.
Of course, it was natural to be scared.
Se-hee had photos of my weakness.
I wore only the bra and put on the one-piece over it.
Because the skirt was short, it was empty below.
Going out like this, I’m not even a woman…
Feeling awkward, I went to the shoe cabinet.
Se-hee, who followed, said.
“Cute.”
“Eh, huh? Me? You think I’m cute?”
“Yeah. It suits you well.”
“…Th-thanks.”
Se-hee tapped her own lips with her finger.
As if to say kiss.
It was something I used to do to Se-hee when I was little.
When I did that, Se-hee would snugly hug me and give a peck on the lips.
Thinking that the roles had reversed, I brought my lips to Se-hee’s.
Kissing between sisters is nothing special…
At that moment.
Se-hee suddenly pulled my waist and overlapped our lips.
At the same time, she thrust her tongue into my mouth.
“Mmm…!”
I opened my eyes wide.
Surprised, but because my waist was held, I couldn’t pull away.
Se-hee didn’t stop there.
She slid her hand down and lifted the one-piece skirt.
She groped my bare butt without panties.
“Hah… hah…”
At that moment, footsteps were heard.
“Se-ah. When you leave, throw away the trash.”
It was Mom.
Se-hee immediately let go of me, and I hurriedly stepped back.
But then my foot tripped.
“Ah!”
With a thud, I fell on my butt.

“What? You fell?”
Mom approached with the trash bag.
I quickly folded my legs and stood up.
“Ah, wait, I’m dizzy…”
“Why are you acting so weird? Are you hurt?”
“I’m not hurt. I’m fine!”
“Ugh, really.”
“Trash, please. I’ll throw it away while going.”
“No need. I’ll just throw it away.”
“No! I can throw it away!”
I snatched the trash bag from Mom’s hand.
“Then, I’ll go!”
“Be careful! Don’t fall again!”
“Okay!”
Before leaving, I glanced at Se-hee.
Se-hee was staring at me intently, licking her lips with her tongue.
Like a predator.
“I’ll be back…”
“Come back.”
I left the house like I was running away.
* * *
“……”
Me, wearing the short one-piece without panties, sitting in the cafe.
The touch of the cafe chair on my butt was very cold.
I held my legs tightly together and casually sipped the straw of my Americano.
“So, our team leader, she contacted me again this weekend, right?”
On the table, my high school friends Ji-eun, Su-jin, and Na-yeon were chatting.
“By the way, I had a really intense night with my boyfriend yesterday.”
Ji-eun said, slightly lowering her voice.
A very natural topic shift.
“How many times?”
“Five times. Ah, but it was really good. My boyfriend was really active yesterday…”
Ji-eun’s face turned red.
Su-jin and Na-yeon laughed and slapped the table.
“You have good stamina.”
When girls get together, they subtly, or openly, talk about lewd things.
Of course, I had a disinterested expression and just sucked on the straw.
A man, sex.
It had nothing to do with me.
Suddenly, Su-jin glanced at me.
“Speaking of which, you’re still…?”
“Huh? What?”
“What do you mean? Boyfriend.”
“Ah, yeah. Not interested.”
Answering dryly, Na-yeon next to me chimed in.
“She’s a lesbian.”
“No, I’m not.”
“Then why don’t you even look at guys? You haven’t even had sex once, right?”
“Hey, what sex? She probably hasn’t even held a guy’s hand.”
“Se-ah, really, do you have any friends you’re contacting? If you work at a cafe, you should get numbers, right?”
A sudden barrage of questions.
A pattern I’ve experienced before, familiar.
I smiled slyly and put up a defense.
“I’m a demigod.”
The friends laughed as if it was unbelievable.
“Pfft, you like being a demigod.”
“You really should try it once. How are you supposed to live without sex?”
“She’s really suffering a huge loss in life right now.”
“She’s too innocent.”
“I agree.”
I secretly laughed ‘ho’ at the friends’ reactions.
Who is innocent?
Right now, I don’t even have panties on!
Last night, I asked my little sister to put them on and reached climax!
Thinking of such a rebuttal, but I could never say it out loud.
Incest, even.
It’s fortunate that the police didn’t catch me.
“Anyway, I’m not interested.”
“It’s said that the most innocent one gets married first.”
“Agreed. Maybe suddenly she’ll say ‘I’m getting married, kids~’”
“Or ‘I’m pregnant, kids~’”
“Yeah, never~”
“Yeah, who knows~”
At that pointless back-and-forth.
Jing.
The phone vibrated.
The sender was Se-hee.
“Ah, it’s my little sister.”
Seeing the screen, Ji-eun said.
“She looks really pretty. Last time I saw her, I thought she was a model.”
“I know. Her figure is amazing. She’s a complete gene jackpot.”
“Why, our Se-ah is also cute. So round.”
While the friends praised Se-hee’s appearance, I answered the call.
“Hello.”
“Where are you?”
A cool voice came from the phone.
“Me? At the cafe…”
“Why aren’t you checking the KakaoTalk?”
“Ah… I didn’t notice.”
“Check the KakaoTalk properly.”
Click.
The call ended coldly.
…What?
In a daze, I opened the chat room.
There were a lot of messages from Se-hee stacked up.
I immediately replied.
“I’m at the downtown cafe right now.”
“Check the KakaoTalk properly.”
“Sorry.”
“If you’re sorry, go to the bathroom and take a photo like last time.”
“Nude pussy photo.”
“……”
“Is this a joke?”
“I’m with my friends right now.”
“I’ll show this photo to Mom.”
One photo appeared on the screen.
It was the embarrassing photo I had sent yesterday.
“I’ll take one.”
At that moment.
“Who are you texting?”
Su-jin leaned in.
I flinched and pressed the power button to turn off the screen.
“M-my little sister.”
“Little sister? Call her too. I want to see her.”
From the side, Ji-eun let out a snort.
“Would she come if called? She’s a student at a prestigious university. There’s a level gap between us.”
“Yeah, because of you she won’t come~”
“Yeah, it’s because of you~”
While the friends teased each other, I stood up from my seat.
“I’ll go to the bathroom for a bit.”
“Come back~”
Clutching my phone, I headed toward the bathroom.
* * *
I entered the innermost stall in the bathroom and locked the door.
After removing the one-piece and bra, I sat on the toilet.
I spread my legs on both sides and turned on the phone camera.
Eh, really…
Outside, the friends were chatting while drinking coffee, but I was in the bathroom toilet with my naked legs spread.
I’m a pervert, no doubt.
By the way, why is the phone camera’s image quality so unnecessarily good these days?
It looks too explicit.
Click.
I took the photo and sent it to Se-hee.
Immediately, a reply came.
I stared at the phone screen and sighed.
I lowered my hand and made a V with my index and middle fingers, spreading my flesh on both sides.
Even though the image quality was already good, spreading it made my inner lips blatantly visible.
Outside, there was a slight wetness from the fluids.
Was she excited?
While following my little sister’s command to take the photo, I clicked.
Click.
I took one more photo and sent it.
“……”
“I’m not a bitch lol”
“I want to lick it”
“No”
“It’s dirty”
“Unnie licked it before”
“I can be dirty”
“But you can’t”
She’s my little sister I’ve cherished since childhood.
I don’t mind being dirty and rough, but I can’t put my filthy fluids into Se-hee’s mouth.
As an unnie’s instinct, perhaps.
“Anyway, good job”
“Now go to your friends”
“Yeah.”