We're Extremely Normal (Probably)
I made a shocking suggestion. “Wanna… try sucking it once?”
My older sister’s eyes widened. But there was no fear or disgust in them. Only pure, unfiltered curiosity about the mysterious new thing she’d just tasted.
Without a word, she slowly—very slowly—lowered her head and brought her lips toward my still-throbbing length. I swallowed hard. The moment her soft lips touched the tip, goosebumps exploded across my entire body.
But that was as far as she went. Not knowing what to do next, she simply stuck out the tip of her tongue and gave the head a tiny, hesitant lick—like she was tasting an ice cream cone.
“Ugh…!”
It was clumsy. Awkward. But the unexpected stimulation made my hips twist as a groan tore out of me. This… this was torture.
Fuck…! This is… this is Noona’s tongue…! No, if she just keeps licking like that I’m gonna lose my mind from the teasing! Nope. Education is required!
I gently cupped the back of her head. She flinched in surprise, but I started coaching her in the kindest voice I could manage.
“Not like that, Noona… Open your mouth a little wider… Yeah, like that… Take the whole thing in, nice and slow…”
Her face flushed bright red at my words. Still, she didn’t resist. Following my instructions, she awkwardly took me into her mouth. At first her tongue only swirled around the entrance, but gradually it ventured deeper. Sometimes her teeth would graze me by accident, and other times she’d gag and choke when it hit the back of her throat. But she never gave up.
She approached it with the serious expression of a student solving a difficult math problem, carefully carrying out every direction I gave. To my eyes, that sight was impossibly adorable—and unbearably erotic.
In the end, I couldn’t hold back against her clumsy but sincere tongue work. Inside her warm, soft mouth, I reached my second climax.
“Mmph…!”
Startled by the sudden burst of bitter, sticky fluid filling her mouth, she panicked and pulled me out. If this had been the old me, I would’ve been basking in satisfaction or laughing at her flustered reaction.
But I was different now.
I jumped up, handed her some tissues, then grabbed a cold bottle of water from the fridge.
“You okay, Noona? Spit it out… and rinse with this.”
My voice was filled with genuine worry and care—so much that it surprised even me. Noona froze completely at my unexpected gentleness. Seeing me worry about her and take care of her instead of calling her dirty or mocking her must have felt completely alien.
She stared blankly for a moment, then took the water I offered and ran to the bathroom to rinse her mouth.
Shit, what the hell am I doing? I’ve basically turned into her boyfriend.
I stood in the living room thinking. It felt awkward. Cringe, even. But… I didn’t hate it. In fact, I wanted to take care of her more. I wanted to be even gentler with her.
The next day, I sat blankly in front of the computer in my room. The intense memories from yesterday and my own unexpectedly caring behavior brought a wave of post-nut clarity and subtle guilt crashing over me.
Is this really okay? Even if we’re not blood-related, isn’t this going way too far?
To clear my complicated head, I started mindlessly surfing the internet. That’s when I stumbled across a post with a sensational title in one of the communities.
I clicked on it like I was possessed. The source was unclear, but the content was incredibly detailed and shocking. According to some dubious research institute, “One in five Korean youths has had an incestuous experience, and 60% of those cases occurred between older sisters and younger brothers.”
…What the hell?
I rubbed my eyes.
20%? 60%? Wait, let’s do the math. Out of 100 people, 20 have experience, and 12 of them are with their noona… Holy shit, this is actually super common?
I began to cling to this ridiculous statistic like it was my salvation.
That’s right! Even real blood siblings are doing it that much, so how pure and normal must we be as step-siblings who don’t share a single drop of blood?! We’re above average! In fact, developing this relationship further might just be the natural order of things!
I nodded my head vigorously, like a sage who had just discovered the truth of the universe. Through perfect self-rationalization, I completely wiped away the guilt that had been tormenting me since last night.
And now, I was burning with a sense of mission(?) to become even more intimately connected with Noona.
The next morning, after completing my mental victory, I headed to school with a light heart. But to my eyes, the world looked completely different from yesterday.
The moment I entered the lecture hall, a couple caught my attention. They were the famous campus couple everyone knew. The guy was gently stroking the girl’s hair and smiling affectionately. Normally I would’ve just thought ‘Fucking gross,’ and moved on.
But today, my eyes saw something else.
Wait a second… Don’t those two have the exact same eye shape? Their noses look similar too. Even the angle their lips curl when they smile is identical… That’s… the power of genetics. They’re undeniably siblings. They’re just pretending to date!
I nodded to myself, fully convinced.
Lunchtime in the cafeteria was an absolute festival of delusion.
A couple sitting across from each other, feeding one another.
That comfortable atmosphere, that familiar skinship. That’s not the tension of lovers. That’s pure family vibes. They’re definitely childhood friends who played house together as kids. Incest confirmed.
A couple sitting side by side, eating the same menu and looking at their phones together.
They’re not even talking. That’s 100% it. That sense of stability can only come from people who’ve lived together their whole lives! I bet they perform secret rituals together every night just like us. Incest confirmed.
The walk home after school was even worse.
A boy and girl playfully bickering at the bus stop.
“I told you to stop!”
“You started it!”
That snappy tone, that natural skinship. Textbook real-life siblings. I bet they roll around in bed at night. Incest confirmed.
The terrifying Incest Filter had been installed in my eyes. Every couple in the world now looked like they were secretly committing incest.
After indulging in those delusions for a while, I suddenly snapped back to reality.
“Huk—! Fuck!”
I stopped dead in the middle of the street and shouted. People around me gave me weird looks, but I didn’t care.
What the hell was I just thinking? I’ve gone completely insane, Kang Juhyuk. You’ve lost it. Believing some random unverified research and seeing the whole world as incestuous? There’s no way something that ridiculous could be true.
It felt like I’d been splashed with cold water. My mind cleared.
Yeah… I should keep things with Noona at this level. Going any further would be social suicide. It’s too dangerous.
With a firm resolution to “draw the line,” I returned home. I decided I needed to set clear boundaries with her to keep this dangerous relationship from spiraling.
I took a deep breath and knocked on her door.
Knock. Knock.
No answer. I knocked again.
“Noona, I need to talk to you.”
Still nothing from inside. Thinking she might be asleep, I carefully turned the doorknob and cracked the door open just a little.
And then I saw it.
A breathtaking sight that instantly demolished every resolution and ounce of reason I had.
Noona was fast asleep on her bed wearing nothing but an oversized gray t-shirt and a pair of pink strawberry-patterned panties. Her legs were spread wide in a perfect M-shape. The faint outline of her secret mound visible through the thin fabric. The soft, vulnerable skin of her inner thighs completely exposed. Her belly button rising and falling gently with every breath.
All of it burned itself into my retinas.
…The line?
Social suicide?
Who gives a fuck about that right now?
Every worry and determination I’d made vanished in an instant. My mind went completely blank, and my lower-half junior, completely ignoring its owner’s reason, began rampaging like an enraged dragon.
I stepped into the room as if possessed. The urge to pounce on that defenseless body dominated every cell in me.
But then, a fragment of what I’d said a few days ago flashed through my mind.
“I won’t do it while you’re sleeping. Not while you’re asleep.”
That promise barely managed to slam the brakes on my runaway lust.
Goddammit…! Why did I make that promise…! No, I have to endure it. A man keeps his word. But… I can’t hold back against that! That’s a gift from the gods!
Breathing heavily from excitement, I desperately fought between reason and instinct. In the end, holding back tears, I resolved to leave the room and abandon this dizzying sight behind me.
Yes. I was a cool guy who kept his promises.
Right as I quietly turned around and reached for the doorknob—
“Mmm… Juhyuk…?”
Noona must have sensed my presence and woken up. She sleepily opened her eyes and called my name.
My movements froze in place.
…She’s awake.
I slowly—very slowly—turned toward her like a creaky robot. Noona was looking at me with still-drowsy, dreamy eyes.
In that case… this doesn’t count as ‘while she’s sleeping’ anymore, does it?
An wicked smile I wasn’t even aware of crept across my lips.