episode_0121

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Seo Woojin was going on a date with Lee Hayoon.

To elaborate just a little, that would mean my sister’s boyfriend was going on a date with my sister.

There’s no black humor with sinister undertones in this sentence.

No need to twist it around in your head multiple times—just take it at face value, and that’s it.

So even though I was the first to hear this news, I didn’t think things like, What kind of joke is hidden in those words…?

I just took it as it was.

Ah, so Woojin and my sister are going on a date, huh.

Ah, judging by what Woojin said before, he’s probably planning to have sex with her too.

Ah, then of course, there’s no real need for Woojin to practice all that stuff with me anymore…

Huh.

“…….”

Hmm.

It’s a good thing.

Pretending to be my sister from the start,

mimicking her way of speaking,

being in her room,

wearing her clothes,

…and, well,

doing something that would require a long, long time to air out—

it was pretty weird, honestly.

Even if you think about it rationally, date practice was one thing,

but kissing practice…

…and sex practice?

That’s a bit much, don’t you think?

What Woojin first asked me for was just things like what my sister likes, where would be a good place to take her on a date, stuff like that…

Anyway.

Now, I can just be normal gaming buddies with Woojin.

No more dragging others into my unspeakable tastes.

Still, it’s a relief.

There’s no way Woojin would reveal that secret to my sister.

…The fact that we had sex for half a day in my room,

or that one time I gave him a sloppy, sticky blowjob in our front entrance—

those are secrets I’ll take to the grave.

“…….”

I probably would’ve thought that way until this morning.

121

Let me make one thing clear.

This isn’t because of something as embarrassing as jealousy.

No, why would I even be jealous of my sister in the first place?

Unless Woojin and I were complete strangers (and even then, that’s a stretch), he’s dating my sister, isn’t he?

Jealousy over someone like that? The word itself sounds ridiculous.

Not jealousy—concern.

That’s probably the better word.

…So,

it’s not that I can’t just leave Woojin alone and mind my own business,

but I’m genuinely worried about whether he’ll do well in the real thing based on what he learned from me.

That’s really all it is.

“…Huuuuh.”

The clothes I bought with Woojin—

instead of those, I wore my usual khaki jacket and waited impatiently for school to end.

Luckily, thanks to the… Japanese and Korean sitting in front of me, time passed quickly.

They ignored their studies, whispering and scribbling nothing but dirty talk—surprisingly, it was pretty entertaining to listen to.

Stuff like, Are you doing it again next time?

Or, Then who’s gonna give the blowjob first?

Or, Wouldn’t it be hotter if we both kneeled on either side and licked him up at the same time so he could look down at us?

Not that I expected to overhear the secret that these two were in some kind of threesome relationship with a guy.

…Hero trainees, my ass. What kind of promiscuous hobbies do they have?

Anyway, after half-heartedly sitting through class, dismissal time finally arrived.

From the moment I arrived at school until now—roughly 10 hours—I’d already loosely planned what to do.

Sluggishly getting up from my seat, I headed straight for the infirmary in the main building.

Of course, the plan I spent 10 hours crafting wasn’t something as crude and childish as getting to the infirmary before my sister and butting into their date to give unsolicited advice.

No, it was something a little more mature and meticulous.

Namely—stalking them.

“D-Did you turn off the fire…?”

“I did. And you don’t have to worry so much. It’s not like I’m the one paying the electricity bill.”

“S-Sorry… It’s a habit…”

“….”

There they are.

I didn’t even need to peek around the corner—their familiar voices carried from a distance.

One was, of course, my sister’s.

The other was Woojin’s.

Hearing them,

I glanced around just in case someone found me suspicious,

…confirmed that the area was suitably empty,

and then focused on the voices coming from ahead.

“H-Here, want this? It’s soda-flavored…”

“Ah, I’m not really into gum.”

“…Oh…”

You idiot.

Sure, my sister suddenly offering gum was weird, but even if you hate gum enough to want to puke, you should’ve just smiled, said thanks, and taken one.

Not really my thing, doesn’t suit me, or chewing gum on a date feels a bit off—

you can say all that after putting it in your mouth first.

Did I not teach you that during our practice dates?

…Now that I think about it, that’s just basic social etiquette, so I probably never even considered teaching it.

But the more I think about it, the angrier I get.

Even I, a kissless virgin, know that much—so why doesn’t he…?!

It’s like he’s a kid who’s never been outside.

I don’t know what to do with him.

Should I send him some advice via text during their date?

Or maybe when my sister isn’t looking…

“…L-Let’s just go…!”

My fingers were already itching to meddle when my sister’s voice reached me again.

At the same time, the sound of footsteps gradually moving away began.

It feels less like a sweet date and more like… something awkward.

Well, I guess my sister’s a kissless virgin too, so it makes sense.

Peek.

I stuck my head out past the corner and saw their retreating figures.

They kind of looked like a couple,

but also kind of didn’t.

Walking side by side with a distance that could be called innocent in a good light

and awkward in a bad one.

Staring at them blankly, I cautiously began to follow.

The academy was quiet enough that I had to carefully trail from a distance, but once we got outside, there was no need for that anymore.

Partly because the streets were crowded in the evening,

but also because people rarely look back, just like they rarely look up at the sky.

And even if they do… it’s just a quick glance over the shoulder when their neck prickles.

So unless they turned into an alley, I could follow them almost right behind.

To put it in exact terms—about three steps away?

Close enough to eavesdrop on their conversation.

…Not that it was anything special.

“L-Let’s go watch a movie…!”

“A movie?”

Their arms almost touching but not quite,

my sister’s trembling voice carrying over from behind her swaying ponytail.

“…Do you not like movies, Woojin…?”

“No, I don’t dislike them. I’m just surprised.”

“D-Do I look like someone who doesn’t enjoy cultural activities…?”

“…Ah, no, I just thought you’d suggest dinner first.”

“…Are you calling me a pig? I-I haven’t gained weight…”

“I know. You haven’t. It’s just… how do I put it? The way you eat suits you. Like a squirrel.”

“…What’s that supposed to mean?”

Listening to them made me furrow my brows and scoff,

but it was also… weirdly sweet.

Woojin’s voice, full of laughter.

And on top of that—

“If you want to watch a movie, let’s do that first. We can always eat later.”

“T-Then let’s go left here…”

“Left…”

“…….”

“…….”

“…….”

Sneak—

A word like scurry would fit better—

my sister suddenly linked arms with Woojin through his coat,

and when he looked at her, she pretended not to notice, acting all aloof.

“…H-Hey…! Stop…!”

Woojin chuckled and ruffled her hair,

and though she flailed her arms, protesting Don’t mess up my hair…! Tch…, she didn’t resist much in the end.

“Should I stop?”

“My hair’s gonna get ruined… Ugh…”

“Then what should I do? You keep acting cute in front of me even though you always demand I treat you like a noona.”

“D-Don’t drop the honorifics again…! And what’s cute about this…! I just linked arms, that’s all…!”

“Doesn’t seem very noona-like to me.”

“…….”

Well,

it was just stuff like that…

“How about you call me oppa instead? That’d suit you better than me calling you noona.”

“D-Don’t talk nonsense…! You keep trying to act like my equal… What kind of little sister feeds her oppa lunchboxes…?”

…Or not.

Something strange.

Something…

secretive.

“Just once? As a joke?”

“…Even as a joke, no.”

“What if it’s my lifelong wish?”

“…W-What kind of lifelong wish is that…?”

“…Then later… …. …I’ll do it for you.”

“…….”

The kind of conversation I shouldn’t be hearing.

Whisper whisper.

Leaning in close so no one else could listen,

murmuring right into my sister’s ear.

“…O-Oppa…”

“Hayoon.”

And then—

I ended up witnessing my sister call Woojin oppa.

“…T-That’s enough. Stop. Okay?”

“Just one more time?”

“I-I said that’s enough…! I’m so embarrassed my face is burning…!”

The sound of oppa in my sister’s voice.

The sound of my sister’s name in Woojin’s voice.

Both reached my ears—

crystal clear, sharp enough to be seared into my mind.

But what Woojin whispered as his reward—

I couldn’t hear it at all.

“…Too bad.”

“W-What’s too bad…?”

What exactly did Woojin whisper to my sister just now?

What could possibly make my usually prideful sister blush to her ears and mumble oppa to someone younger?

It couldn’t have been something childish like a free massage coupon…

And there’s no way it was something monetary like money either.

So that leaves…

…nothing, really.

“…H-Hurry up… …Oppa.”

What did she hear to make her melt like that?

“…Let’s go. Hayoon.”

“…….”

“What’s wrong? …Ah, should I call you noona to get you to move?”

“O-Of course…!”

And why do you—

love hearing oppa in my sister’s voice that much?

“…….”

And why am I—

listening in from behind,

thinking something as pointless as,

I could call you oppa too…

…Pathetic.

Really.