episode_0050

50

…You were the one who kissed me first without saying anything.

You were the one who slyly grabbed my waist,

then slid your hand up so sensually it sent shivers down my spine,

forcibly yanked up my bra—which could’ve been undone with just a flick—

and kept kneading my soft nipples.

You were the one who did something bad first.

All I did was…

just help you practice fucking my sister.

So I only teased you by calling you a “tiny-dicked bastard”

to piss you off, knowing full well

that later, you’d be having wild sex with my sister

on this bed,

in your house,

somewhere,

behind my back.

But then,

…it just naturally led to me asking

if your dick was small.

Ah, ahaha…

Just kidding. Kidding.

Did it upset you?

Tiny-dicked—

“……”

“……”

Clink, clink.

A sound I’ve never heard before—

the metallic clatter of a man unbuckling his belt—echoes loudly in my ears.

Unable to cover them,

with my wrists pinned tightly above my head,

he looms over me,

staring down like he’s about to devour me,

clink, clink.

“…Hey. Seo Woojin.”

“What?”

“…Y-you remember the no-sex rule, right…?”

“I never said a word about having sex. I just asked if you wanted to see my dick.”

Right.

That’s true, but

just in case,

I should probably make it clear one more time…

If we stick to just “practicing,” I can at least pretend it’s not that bad,

but if I end up doing… that with my sister’s boyfriend,

it’ll really become something bad.

I…

don’t want to do bad things.

Really.

“T-then you can take them off. Your pants.”

“I was already taking them off. It’s too late to say that now…”

“A-anyway…!! …I’ll at least inspect it for you.”

“Inspect?”

“I know what kind of porn my sister watches. …I remember roughly how big the… thing was.”

“Alright, go ahead then.”

“…Hurry up and thank me.”

“Thanks. Virgin brat.”

“…Tiny-dicked bastard.”

Woojin just chuckles, no longer even reacting to the same insult.

As his fingers fumble, his black slacks slide down to his thighs,

and I see a man’s thin underwear for the first time in real life.

For a brief moment, I’m flustered by the long, sideways bulge at the center.

“……”

Thump.

Contrary to my expectations—

that is, what I roughly imagined it would look like—

it’s shaped a little differently from what I’ve seen in porn and other media.

…An enormous dick

casts a lewd shadow over my lower stomach.

From the tight little hole

to just below

my navel.

Vulgar,

and grotesque.

“Hey. Ji Yoon.”

“……”

“Ji Yoon-ah?”

“……”

“Ah, should I call you Hayoon noona right now?”

At that length, wouldn’t it be longer than my handspan?

A handspan. A handspan is… maybe…

20.

More?

Or not?

…Anyway.

So if I had sex with Woojin,

that thing would reach just below my navel,

wrecking my hollow womb,

thud,

thud,

thud.

…Squelch,

squelch.

Stuffed full.

And then,

gulp,

gulp.

Overflowing…

Unnie.

Will you be okay?

“Is it small?”

“…H-huh?”

“I asked if it’s small. Noona.”

“…S-small? This? And why ‘noona’…? Ah, that…”

Woojin’s lips twitch slightly as he watches me flounder at the sudden question.

It takes me a moment to understand his expression, but after about five seconds, it hits me.

He’s clearly struggling to hold back laughter.

…You bastard.

You know your dick is huge and you’re just messing with me…!

“I don’t really know how big other guys are.”

“…You’d know if you watched even a few porn videos, you idiot!”

“I only look at the girls’ bodies. Who has time to stare at guys’ dicks? I’m not gay.”

“……”

“So? Is it small?”

…You’re such a bastard.

Even if you’re not interested in the same sex, there’s no way you don’t know.

You just want to hear me say “it’s big” after all the teasing, don’t you?

I knew guys were childish, but this much…?

How is a 20-year-old guy no different from a 10-year-old kid?

For a moment, I stare blankly at Woojin’s smug grin.

Then, glancing at the thick, veiny dick, I mutter,

“…I-it’s average?”

“Yeah?”

“Yeah. All the dicks in the porn I’ve seen were around this size.”

I force a casual smile as I say it.

I won’t stoop to your level.

I won’t give you what you want.

Hmph.

“So at least it’s not small, then.”

“……”

“Right?”

“……”

…Am I as dumb as an animal?

I was pretty good at studying for someone who games a lot…

“…Think whatever you want.”

“That’s disappointing. I thought it was big enough to…”

“…H-hey…! Wait…!”

“I thought it was bigger than most.”

While I’m busy marveling at my own stupidity, Woojin taps the hard object against my bare skin.

Still on top of his intact jeans.

Because Woojin yanked them up to grope my chest, my stomach is fully exposed,

and now,

in this position,

as if we’re mating,

he presses it against me as if to imprint how deep it would reach.

…W-well,

it’s not like that part matters.

Every time the head of Woojin’s dick touches my stomach, I instinctively tense up,

and no matter how much I try to act indifferent, my cheeks keep burning.

Having sex with my sister’s boyfriend behind her back.

Common sense says my sister would never forgive me.

But even knowing that, every time his dick touches me, these dirty thoughts keep surfacing.

As long as my sister doesn’t find out, it’s fine, right?

It’s like a devil whispering in my head.

Normally, an angel would argue back in situations like this.

Why is there only a devil in my head?

Get out of my head.

Drop dead.

“…I-it’s average, okay…?”

“If I shoved it all the way in, it’d reach here, right? Still average?”

“…Pfft. ‘Shove it all the way in’… Girls don’t even like that. Such a tiny-dicked way of thinking.”

“No, I’m asking if it’s average. …And how would you know, virgin?”

“Just think about it. If something that huge went all the way in, of course it’d hurt.”

“Weren’t you just saying it’s average? Are you drunk or something?”

“…A-anyway…!”

I’m rambling,

and even I know my words make no sense.

Let’s just do it behind Unnie’s back.

Woojin clearly wants it too.

Look how hard his dick is—he’s turned on by my body, not Unnie’s.

My head spins from the devil pounding insistently at my back, but my resolve remains firm.

No sex.

Because it’s a bad thing.

…But,

“…Let go of my wrists for a second. Move aside.”

if it’s not sex—

“…Close your eyes. No, turn around and face the wall.”

“Suddenly, why?”

“Hearing you say you’d ‘shove it all the way in’ makes me too nervous.”

“…Then why tell me to face the wall?”

“Before you do it with Unnie, I’ll help you practice, so just face the wall…!”

In other words,

if it’s just practice—

“It should be around here… …Ah. Found it.”

…it’s fine, right?

Unnie.

“…Are you going to stay like that the whole time?”

“…Shut up.”

“If you’re that embarrassed, you don’t have to do it. I’ll be gentle with Hayoon noona…”

“…I said shut up.”

After her bizarre declaration of “sex practice,”

Ji Yoon, acting just like her sister, makes it impossible to suppress a smile.

Too embarrassed, she hugs a pillow tightly to hide her face—

exactly how I saw Hayoon behave during her first time.

Her jade-green eyes,

how she gets tipsy after just one beer,

how all her sensitive spots are clustered near her womb…

Despite seeming so different at first glance, the sisters share more similarities than expected,

and knowing I’m the only one who sees it

is thrilling.

“So, are we really doing this?”

“…Do it before I change my mind.”

“Can I hold your thighs?”

“Stop asking about every little thing…! Just, just fuck me alrea…!”

Muffled protests from behind the pillow.

I kneel between her legs, watching as the bed creaks and she falls silent—adorably so.

The Ji Yoon I remember, the one called “the position keeper,” suited coldness far more than cuteness.

But realizing it was all just because she’s shy

makes this side of her infinitely more fitting.

“What if noona’s clothes get dirty?”

“Just wipe them off and throw them in the wash.”

“You didn’t plan ahead at all.”

“…I have extra dolphin shorts anyway. No one will notice.”

As she says this, Ji Yoon tugs self-consciously at the “sister’s” dolphin shorts she just changed into.

So…

She’s offering to help me practice sex,

wearing her sister’s dolphin shorts,

and telling me to thrust between her thighs.

Now that I think about it,

is this even a normal conversation?

…No matter how you look at it, it just seems like a little sister lusting after her sister’s boyfriend.

“You’re embarrassed too, so let’s finish quickly.”

“…I-I’m not embarrassed at all…! Are you getting self-conscious abou…?”

“Say that after letting go of the pillow.”

“……”

“Relax your legs. Rest them on my shoulders. Otherwise, I’ll have to thrust against your calves.”

“…Nn, okay… H-here…”

Humans are creatures of adaptation.

The first attempt at anything is hard, but once you push through, everything after becomes trivial.

Like stealing.

Or preparing to corrupt a hero.

Or secretly meeting your sister’s boyfriend behind her back.

It’s all the same.

Today, a handjob.

Tomorrow, a blowjob.

The day after, penetration.

The following day, creampie.

And the day after that, pregnancy.

Not that I plan to rush things that far.

…Anyway.

Hah…

“…Nn…!”

Gripping Ji Yoon’s smooth, pale thighs,

I thrust my fully erect dick into the narrow gap between them.

Part of me wants to ignore her rules and pound away, but…

…I’ll save that for later.

When she’s whining about her sister,

I’ll whisper in her ear,

What were you thinking back then?

Her reaction will be priceless.

“…Should I go deeper? Or just stay like this?”

“…H-how much is in already…?”

“About… halfway, maybe? Enough that it won’t slip out of your thighs.”

“……Wait.”

Still clutching the pillow, she hesitates before carefully bringing a hand to her thigh.

Is she planning to rub the head with her palm?

As I idly wonder, her fingers instead creep along the side of her thigh.

…Then,

measuring the thickness where our skin presses together,

she spreads her fingers wide

and gently places them against her lower stomach—

to gauge the length.

Gently.

“…Hey. Seo Woojin.”

“Yeah?”

“You said… it’s halfway in?”

“Yeah.”

With her thumb at her navel

and her pinky barely brushing her pussy,

she traces downward,

just a few centimeters below her belly button,

mentally mapping how deep it would go if we really had sex.

Then,

“J-just that much… No deeper.”

“……”

“Any more… and I’d definitely break. …Unnie.”

“Yeah?”

Not even fully sheathed,

just a little past halfway,

her white flag flutters weakly

as she surrenders.

And even then,

she still drags her sister into it.

So damn cute.

“…Okay. Then… move slowly. I’ll tell you if anything feels weird.”

“I love you.”

A single phrase.

“…H-huh?”

“I love you. Noona.”

“O-oh, uh, ah…”

“……”

Deliberately spoken,

then—

“I… I love you too… Woojin-ah…”

“…Don’t call me ‘Woojin-ah.’ It doesn’t suit you.”

“…S-shut up…!”

I start thrusting between Ji Yoon’s thighs,

feeling really good.