Oppa, Suck My Gochu
I opened my eyes to a bursting bladder. The clock read eight. Mom would've already headed out for work—early class day. I needed to piss bad. Normally, I'd just hit the bathroom and let it fly, but not anymore. If I go, Chaeyoung goes.
I grabbed my phone and opened Messenger. What to send? We'd agreed on emojis. But what's the emoji for gotta pee? Water drop? Too vague. Wave? Even worse. After agonizing, I sent it.
Read receipt popped up in one second. She wasn't asleep?
Exclamation marks. Got it? Or freaked out? Footsteps in the hall—door creaking, slippers shuffling, sprinting to the bathroom. She was running. Chaeyoung's been sprinting in the mornings lately.
I got up too, shuffling in my slippers toward the bathroom. Door was shut. I knocked.
"Chaeyoung."
"Wait! Prepping right now!"
"I'm coming in."
"...Huh?"
Flustered voice. Totally expected. But I pressed on shamelessly.
"Gotta check how you pee."
Silence from inside.
"Why you?!"
"You've never properly pissed with the gochu. Can't have you messing up."
"I did it fine alone yesterday!"
"You sat down anyway. Mess up the aim, it'll splash everywhere. And you know cleanup?"
She might manage peeing somehow, but wiping? No clue. Nothing special about guys, but still. Plus, morning wood—piss can go sideways. Universal guy gripe, but she wouldn't know.
Long pause inside, like she was mulling it over. Then...
"...Door's not locked."
Permission granted. I opened it. Chaeyoung stood before the toilet in just a T-shirt and panties—pajama bottoms already off. Face beet red.
"Don't look."
"That's why I'm here."
"...Still. Don't stare."
Her panties bulged up front. Morning wood.
"Sit first."
She dropped her panties and sat. The gochu pointed straight up. Pee like that, it'd arc forward.
"Press it down. Aim inside the bowl."
"...Like this?"
She gripped it, bending down. Stiff resistance—hurt me too if forced.
"Don't squeeze hard. It'll snap. Just hold the angle."
She adjusted carefully. Tip aimed into the bowl.
"Good. Now relax."
She tensed her belly—no, relaxed. Peeing's about letting go, not pushing. I did the same. Shhh... splish-splish-splish. Sound of piss from the gochu. Weak at first, then a strong stream. Sensation hit me too—bladder's sweet relief. That's my feeling.
But Chaeyoung's face shifted subtly.
-Shiiiik. Another sound between her legs. Wider spray, different from the gochu. Her pussy was peeing too. Simultaneously with mine.
"...Ah."
Her face flushed deeper. Caught her off guard. Morning, so her bladder was full too. Gochu signal opened both.
"It's fine. Natural."
"N-not natural..."
Not really. Dual streams? Unnatural. But this whole setup's absurd anyway. Stream tapered off, dribbled, stopped. Both sides.
"...All out?"
"...Yeah."
"Show properly."
"...What?"
"Cleanup. Gotta check you wipe right."
She looked up, eyes protesting. But logically, no comeback. Taught her to jerk yesterday; today, peeing. Same deal.
"...Gotta lift my legs to see."
"Do it."
She planted both feet on the seat, squatting wide. Everything exposed. Gochu half-deflated, dangling forward. Balls below, pussy under that. Piss on both—tip and lips.
"...See enough?"
"Yeah. Hold on."
Ripped toilet paper, folded neatly.
"O-oppa?!"
"I'll wipe. Stay still."
She shut up. Thigh twitched, but legs stayed open. Started with gochu—patted the last drop. My gear, so I know the drill. Gently wrapped, stroked down.
"...Mm."
Her soft breath. Sensitive already. Just wiping.
Next, below. Fresh paper, generous. Wiped her pussy front to back. Know the rule—backwards spreads ass germs.
"Ha...!"
Breath shaky. Fingers gripped the seat.
"...Oppa, that... really wiping?"
"It is."
"Too thorough for wiping."
"Half-ass it, hygiene issue. Can't let my sister get sick."
Lips pouted, but no more protests. Couldn't argue. Final gentle pass, done.
"All good."
"...!"
She lowered her legs, stood, pulled up panties—glanced at me. Still red.
"Every day like this?"
"Not every. Till you're used to it."
"...How long?"
"Till you can solo properly."
She started to speak, stopped, turned away. Ears crimson.
"...Wash hands. You too."
"Yeah."
Side by side at the sink. Mirror showed us: messy-haired bro, red-eared sis.
"Time for breakfast."
"...Okay."
Out of the bathroom. She trailed me to the kitchen, murmuring.
"Oppa."
"Yeah."
"Don't forget last night's promise."
Morning favor. Text flashed back.
"Food first."
"Got it."
She sat. Mom's spread: covered rice, seaweed soup, anchovy stir-fry. Fridge Post-it:
Heat up the rice and eat. Make sure Chaeyoung eats too. Home for dinner. ♡
Chaeyoung saw it too.
"...Mom says make me eat."
"Then eat. No food, no favor."
"Fine, I'll eat."
She heated rice, dug in hungrily. I sat across, slurped soup. Tasty. Might be our new morning routine: emoji pee alert, bathroom wipe, breakfast, jerk-off. Bizarre normalcy. Not bad.
*
Brushing sounds stopped, door swung open under thirty seconds.
"Oppa. Hurry."
Chaeyoung stripped on entry—T-shirt fluid as water. Then shorts. Panties. All on the floor in half a minute. This the girl clutching sheets and deep-breathing yesterday? Adapts scary fast.
"...You're way too natural now."
"Your fault."
Fair. She climbed my bed like hers, center, head on pillow, posed. Ready eyes. I sat beside, stared at nude Chaeyoung. Thought it'd get routine. Nope. Heart still raced. Pale skin, unbrushed long hair, slim collarbone. Perky pretty tits. And below, my incongruous gochu jutting up.
Hand on her breast. Eyes closed.
"Mm...!"
Slow start, gentle. Till her body opened. Circles, nipple grazes—her breaths hitched. Gochu stirred. Our arousals syncing.
Mouth to breast. Tried yesterday, no protest now. Her hand on my head, fingers light in hair.
Then she spoke.
"Oppa."
"Yeah."
"Wanna try something."
"What?"
Curious, exploratory girl. Learned new, craves more. Whatever she wants, make it happen.
"You did my tits with your mouth."
"Yeah."
"So... gochu with mouth too?"
I looked up. Dead serious eyes.
Brother's mouth on brother's gochu. Her body's my gochu. Logical in her head. But...
"...No."
"Why?"
"Why? Can't suck my own dick."
"Why not? It's on me now. You did tits."
"Different."
"How?"
"Gochu's mine. My mouth on mine? No. Hell no."
Firm. Absolutely not. Self-fellatio? Circus act, not this.
"You wouldn't suck your own either."
She pondered.
"...Dunno if it's that gross."
"No. Gochu stays mouth-free. Forever."
Nailed it. Other stuff fine, not that.
"...Other stuff then?"
She caught my words sharp. Good ears.
"...!"
Eyes sparkled. Realization.
"Pussy then?"
"...!"
Pussy. From perfect Chaeyoung's mouth.
"Tits with mouth. Pussy too, right?"
Logical. Weirdly. How many times now?
"...Yeah. That's normal anyway."
"Do it."
Bold words, red ears. Asking bro to eat her out—not casual.
"You okay? Not embarrassed?"
"...Embarrassed."
Honest.
"But still want it?"
"Feels good when you do. Embarrassment's separate."
Chaeyoung logic. Ironclad.
"If you're cool, I am. Siblings, no dirt."
"Then why no gochu?"
"Not siblings. Mine."
She giggled. For real.
"Kinda funny."
"Laugh or not. Verdict?"
"Do it. With your mouth."
Her pussy, my mouth. Suck it. My gochu on her crotch throbbed in anticipation.