Chapter 34: Our House Where No One Knows What Sex Is (1)
I couldn't keep playing the board game with Yoo Yeonhui's legs trembling like that, so we parted ways at the board game cafe. Dinner would have to wait for another time.
"Ugh…."
And then the next day, that golden weekend. I was sprawled out in bed, unable to get up. What could I do? I'd been churning out cum and shooting it, over and over, nonstop. It would have been weirder if my body wasn't completely drained.
Conveniently, both Yoo Yeonhui and Joo Seoyoon had plans today, so my schedule was wide open. I was just about to savor this lazy weekend and drift back to sleep when a sound rang in my ears.
Beep beep beep—ring ring~
"What the hell."
The only people who knew the passcode to my one-room apartment were family. Dad wasn't the type to drop by his son's place unannounced like this, and Mom always called ahead. So that left…?
"Hey, Kang Ihyeon."
My little sister—well, cousin, technically. Seong Chaerin. It was a bit of a complicated relationship. But were we close enough for her to show up out of the blue like this, without a word?
Not really. Seong Chaerin, with her white-and-blue two-tone dyed hair, was loaded down with luggage as she said,
"Let me crash here."
"What?"
"I fought with Mom and Dad."
"Just go back home."
"No way."
"What'd you fight about?"
"There's a reason."
Frustrating as hell. She wasn't some hormonal middle or high schooler—she was a college student pulling a runaway act. She'd always been the good girl who listened to her parents, unlike me. Why the hell was she doing this now? Could this be another side effect of the shifting common sense?
"So how long are you planning to stay?"
I asked, a sense of dread creeping in. The amount of stuff she'd brought was no joke. Two massive suitcases, plus a backpack. How long did she think she'd be here, packing like that? Even a ten-night, twelve-day trip wouldn't require this much gear.
"Uh… till graduation?"
"Are you insane?"
She'd just started college, and she was talking about staying till graduation? Not some two-year tech school—she'd gotten into med school, so that was six whole years.
"I dunno. Mom knows I'm here, so if you're gonna complain, take it up with her."
"She knows?"
I'd assumed it was a straight-up runaway situation, but this seemed more complicated. With no choice, I called Mom for the first time in ages.
—Oh, yeah, looks like she made it there safe.
Seong Chaerin said you two fought, but Mom's tone didn't sound remotely upset. I pressed her urgently to confirm what I'd heard.
"What's going on here? She's talking about freeloading at my place till graduation."
—You know how stubborn she is. Take care of her for me.
"A whole year? No, she's saying five years plus."
—Don't worry about money. I'll send plenty of allowance.
"It's not about the money."
My bank account was already flush from the allowance I'd gotten. Hell, I could coast without working for years at this rate—arguing would just hurt my mouth.
—Oh, gotta go, Mom's busy. Take good care of Chaerin, and make sure she doesn't hang out with any weirdos!
—Click.
"Mom? Mom! Mom!"
"What'd she say?"
"…Should I find you a room somewhere?"
"Nah. I'm staying here."
"Fuck."
"You don't want me to?"
What a ridiculous question. She'd barged into my perfectly fine solo pad and now she was asking if I minded?
"Of course I do."
"Why?"
"Well…."
What was I supposed to say? The most logical, convincing answer…?
"I can't bring my girlfriend over."
"Why not?"
"…I can't kick you out every time, can I?"
"Why not?"
"Then what, you wanna watch me fuck from the sidelines?"
"What's sex?"
"…What?"
"Why do I have to leave if it's sex?"
I was so floored by the absurdity that words failed me. She was twenty. Twenty years old, acing med school—there was no way she didn't know what sex was. I was about to snap at her, figuring it was an act, but I held my tongue.
Could this be…>
So far, the shifts in common sense had all trended toward sexual openness. In simple terms, the world turning pervy. But it didn't have to go lewd every time. What if some places swung the other way—sexually repressed or ignorant? And what if my house was one of them?
"You keep asking what sex is."
"Uh… it's dick and pussy stuff, right?"
"Yeah, and?"
……No point. She seemed to have zero knowledge of anything sexual.
"Ah."
There was still one way.
"Wanna step outside for a sec?"
"What's up? You're acting weird today."
"Just come out."
I grabbed Seong Chaerin's wrist and dragged her outside by force.
"What is it?"
"I'll be straight with you."
"Okay."
"I need the place empty to fuck my girlfriend at home."
"So?"
"…Get out."
"No."
Another curveball. I'd figured explaining outside would make her get it. Instead, her icy expression screamed she wasn't budging.
"Tell me when you're bringing your girlfriend. I'll make myself scarce."
Click.
"Hey, no!"
Then she slipped back inside and shut the door.
"What the actual fuck."
My brain couldn't process the ridiculousness. Why was she like this? Where was the girl who'd always obeyed her parents, even through puberty? We'd never been super close, sure, but still.
"Fine, use that room over there."
"Yeah, I already unpacked."
"Good job~."
By the time I'd popped out to the convenience store and back, she'd already claimed the empty room she'd visited a few times before and unpacked everything.
"Get a desk for my room."
"Why tell me?"
"Who else?"
"……Fine. I'll handle it."
No point starting a pointless fight. Best to act like she wasn't there. And boot her out ASAP if I could. I ordered a decent desk from IKEA and flopped onto the sofa where she was lounging.
"You eat yet?"
"Yeah, and since I'm crashing here, I'll cook."
"You can cook?"
"Hmph."
She scoffed like the question was beneath her.
"Thought not."
"Then we'll just order in."
"Hm…."
She looked oddly dissatisfied at the idea.
"What do you want?"
"Rose tteokbokki."
"Straight to the point, huh."
"So?"
"Sigh."
A sigh escaped me. Live with this girl for five years? Hard pass.
"Oh? A Switch? Got Animal Crossing?"
"Yeah, but…."
"Lemme play."
"Whatever."
I'd gotten bored of it ages ago anyway—couldn't even remember when I'd last booted it up for the endgame.
"You played before?"
"Nope."
"Alright, hang on…."
I showed her the ropes on the Nintendo Switch, hovering a bit, when the tteokbokki arrived.
"Hey, pause and eat."
"Okay."
I shut off the Switch, threw on some variety show, and dug in.
"Ahh, tteokbokki hits different. Thanks for the grub~."
"Yeah, eat up."
As we chatted about recent goings-on while watching the show, some rose sauce splattered on Seong Chaerin's clothes.
"Hold on, tissue…."
"Thanks."
She wiped the sauce with a wet wipe and stripped off her shirt. Right in front of me?
"Hey?"
"What?"
"What're you doing?"
"Taking off my shirt?"
"Why?"
"Sauce got on it."
"No, I mean…."
Then eat carefully so it doesn't splash. Why strip?
Even if I'd seen her as a little sister growing up together for ten years, she was a full-grown woman now. My eyes drifted to Seong Chaerin's chest without thinking.
When did they get that big…>
Hard to tell under her baggy shirt, but damn, they were huge. Not on Yoo Yeonhui or Joo Seoyoon's level, but considering her frame, they were massive. Those two were pushing 170cm, while Seong Chaerin was mid-150s. Yet her tits were head-sized—making them look even bigger by comparison.
"Ah, fuck."
"What? Why the sudden cursing?"
I was hard. My dick had swollen up. Getting erect over the girl I'd thought of as a sister? It bruised my pride, and I wrestled with whether to embrace it as fate.
"…Never mind. Let's just eat."
I tossed her a spare shirt. No way was I eating with my little sis in her underwear.
"I'm fine."
"I'm not, so put it on."
"You're really weird today. You sick or something?"
"It's not me who's sick…."
I couldn't exactly say you're the weird one. How do you explain this? That common sense warps inside buildings? She'd have me committed.
Luckily, as I clutched my head, she seemed to sense something and put the shirt on.
"I'm gonna shower."
"Yeah."
After we finished eating, I cleaned up while she headed to the bathroom. Once I'd sorted the leftovers and recycling, the bathroom door opened.
"Ahh~ Feels good."
"You crazy bitch!"
"What now?!"
She snapped back at my curse over her post-shower state. Absurd as it was, I chalked it up to the shifted common sense and opened my mouth.
"Put some clothes on quick."
"I'm about to sleep. Why?"
"…You don't wear clothes to bed?"
"Duh."
"Right… of course…."
I gave up. Whatever happens, happens.
