Chapter Index

    .

    …It looks so fucking awkward.

    When unnie said she likes this kind of thing, I deliberately threw in some swearing—but it just doesn’t suit me at all.

    And Seo Woojin, acting like some kind of sadist, trying to take control as if he’s holding a leash—that doesn’t suit him either.

    If we’re talking about what feels natural, it’d be like when we had Discord on and just fucked roughly, or when Woojin happily rubbed his dick between my thighs because it felt good. That was way better.

    So, if the tension eases, I might even laugh at how ridiculous this is…

    I was a little worried about that.

    “Huu… Even just the tip feels fucking tight. Shit….”

    “…Shut, up… …It’s embarrassing.”

    When I glance at the firm arms bracing my sides.

    When I listen to the soft, pleasurable sighs falling from above.

    …The throbbing pressure I feel between my legs.

    The searing heat I feel even through the condom, making me hold my breath.

    I don’t think I’ll end up laughing while having sex with Woojin today.

    Probably not.

    “It wasn’t like this the first time I did it with Hayun noona either.”

    “…”

    …That smirk of his.

    Except for that one thing.

    “Relax. I’m gonna fuck you hard like last time.”

    “…I did. Already.”

    “Then should I just force it in?”

    “…Stop asking and just do it, dumbass. You gonna do this with unnie too?”

    “Well, right now, it’s just practice.”

    “…”

    He tells me to focus a little more.

    That it’s fine if he just imagines me as unnie and fucks me like he’s raping me.

    Just as I’m about to swallow my embarrassment and say something like that, he pushes his dick deep inside—when until now, it was just the head teasing in and out.

    About as deep as the base of my middle finger, by feel.

    But the thickness is nothing like those cheap masturbation toys.

    Because of that, I bury my face in the pillow, huff, huff, panting heavily.

    …If only I had a dildo at home.

    Every time I masturbated, I’d think of his dick and finger myself raw.

    But nothing compares to the pleasure surging through me now.

    “…Ah, seriously… It’s so fucking tight….”

    “……, ….”

    “I loosened you up earlier, so why does it feel tighter than last time…? Huu….”

    “…! ……?!”

    My body is face down because Woojin told me to be.

    My hips are slightly raised because Woojin told me to.

    And unnie’s boyfriend, acting like it’s his right, thrusts into me roughly, as if frustrated.

    Even as I hug the pillow tightly, clawing at it with trembling hands—

    He doesn’t care.

    Just fucks me.

    Hard.

    “…Ngh…?! Nghhk…! …Ha…hk…….”

    …But his lower stomach never touches me.

    Even as he goes impossibly deep.

    “Don’t pull your hips away.”

    “Ah, haah…, ah….”

    In the middle of it, without realizing it, I must’ve tried to escape—

    Because now he grabs my hips firmly,

    thrust,

    thrust,

    thrust,

    With nothing but the single-minded intent to bury himself to the hilt.

    Woojin treats me like a fleshlight.

    “Huu… Hey. Just turn over.”

    “Hah…, haa…, Why suddenly…?”

    “You’re too tense, so it’s not going in well. Turn over. Hurry up.”

    “…Fuck…! Shut up and wait…! Yours is so fucking big it’s hard… Just pull out first if you wanna talk….”

    “I’ll pull out, so turn over. Good.”

    “…”

    …Hah.

    Talking about me being tense.

    As if I were some virgin—I’m not. I’m completely fine.

    But I guess because he’s a guy too, he wants to act all cool.

    So childish. So childish. Grumbling internally, I turn my body over.

    My chest, pressed firmly into the bed until now, faces the ceiling.

    And so does my face, which had been buried in the pillow just moments ago—

    …No.

    I don’t want him to see this.

    What if—what if—I’m making some stupid expression?

    After being treated like a fleshlight and getting fucked raw—

    What if the corners of my mouth are twitching?

    What would I do then?

    “Your face. You gonna keep hiding it with the pillow?”

    “…Why? You wanna practice kissing with me too?”

    So I keep the pillow clutched tightly even as I turn over.

    It’s a little disappointing that I can’t kiss Woojin while we have sex,

    But it’d be way more embarrassing if he found out how I really feel.

    Because the only thing keeping us together is the flimsy excuse of “practice.”

    “Nah. If you’re embarrassed, keep hiding it. Makes it easier to imagine you’re noona.”

    “…You’re such a fucking pervert. You were imagining unnie while doing me?”

    “Trying to. …Not really working, though.”

    “Why? ‘Cause I’m a little taller? Or ‘cause my tits are bigger than unnie’s?”

    “That too. And because you feel better than noona when we fuck.”

    “……”

    “Anyway, stay still like that.”

    “……Okay.”

    …I feel better than unnie?

    …No, more than that—he’s back to his usual gentle tone…

    …I feel better than unnie?

    Clutching the pillow, I chew on my lip for a moment.

    After steadying my breathing, I lower the pillow just enough to peek out with my eyes.

    I’m curious why he told me to turn over, what he’s planning to do.

    But what I end up seeing is, unexpectedly, nothing special.

    “…Hey. Seo Woojin.”

    “What.”

    “…It tickles….”

    “Good. I was worried you wouldn’t feel anything.”

    “Th-That’s not what I meant…! You idiot…!”

    My arms wrapped around the pillow.

    Naturally, that leaves my underarms exposed.

    My defenseless shoulders.

    My chest, slightly spread open without a bra.

    My navel.

    My lower stomach.

    …My clit.

    And my thighs.

    He’s just gently kissing me all over.

    How should I put it?

    Like he’s caressing a lover.

    “Stop…! It tickles, so just fuck me already…!”

    It’s so embarrassing.

    Instead of relaxing, it’s making me even tenser.

    I kick my legs, struggling against Woojin’s hold.

    …Not that it does much—his body’s annoyingly toned for someone who acts all soft and gentle.

    It’s humiliating.

    We’re,

    Not even lovers.

    Not even fuck buddies.

    Just “unnie’s boyfriend” and “girlfriend’s little sister.”

    “…If you want my dick that bad, spread your legs yourself. Lee Jiyoon.”

    “…”

    I lightly tap his arm with my foot, the same one I’d been using to push at his chest and shoulders.

    Spreading my legs myself is,

    Too embarrassing.

    “…Too shy to show your face. Can’t even spread your legs yourself.”

    “…”

    “But you’re fine with whining for me to fuck you? Not embarrassed about that?”

    “…Shut, up….”

    “…Ah. Fuck. Why are you so hot today…?”

    “It’s—acting… I’m acting so you’d get turned on, obviously…, …nghhk….”

    Tap. Tap.

    Woojin taps my lower stomach with his cock, slick with my wetness, as he asks.

    While I frown and try to argue, he smiles faintly and shoves his dick back inside.

    …Past my fingers.

    Past where he’d been fucking me earlier.

    My cervix.

    This—this is definitely hitting my cervix.

    That’s the only thought in my head as he—

    Shoves.

    Holding my trembling, climaxing body close,

    Shoves.

    …Instead of fucking me like an animal,

    Shoves. He buries himself to the root,

    And stays there.

    As if he wants my walls to memorize the shape of his cock.

    For a long time.

    “…You were tense. It’s going in way easier now.”

    “……, ….”

    “…Jiyoon-ah. Answer me.”

    “…”

    “You’re not passed out, so answer. And stop tearing up my pillow.”

    “…You fucking… bastard… How am I supposed to answer… right now…?”

    “You’re doing fine. Just keep going like this.”

    “Hey, th-there, the tip… stop tapping…! …Ah, fuck…….”

    Mumbling incoherently from under the pillow,

    Because of Woojin.

    Because Woojin buried his huge cock all the way inside and,

    Flicked my nipples,

    Gently prodded deep below my navel,

    Embarrassing liquid keeps leaking between my thighs.

    …Squelch, squish.

    Making sounds like that.

    Busy dirtying Woojin’s body.

    “…I was gonna wash these anyway, but… Now they’re even dirtier.”

    “Bastard… Bastard…”

    Why does it feel so good when he’s just pressing against my cervix?

    He’s fucking me hard enough to wreck my insides, so shouldn’t it hurt?

    A question similar to the one I had during our first “practice sex” floats through my mind.

    …But,

    I think I get it now.

    “Keep swearing. More. More.”

    “…Hey, stop……. Your dick, stop….”

    “…The more you do, the hotter it gets. Keep going. Lee Jiyoon.”

    “You fucking… bastard… Stop pressing there…!”

    “…Here?”

    “Nghhk……?!”

    Because my cervix is an erogenous zone.

    Not that I had some fantasy about being railed by a huge dick like in the porn unnie watches,

    But I was just born this way.

    Even if unnie’s preferences in her head and

    Mine are a little different,

    “…You’re so fucking cute, goddamn it….”

    “Stop, calling me cute… and talking nonsense…….”

    “…How are your reactions exactly the same as Hayun noona’s when we have sex?”

    “Ngh…, ngh…, haa….”

    “If you were twins, fine, but you’re just sisters?”

    “…Ah, there, don’t fuck it so… hard….”

    “If you just moaned honestly about how good it feels instead of swearing, you’d be exactly like noona yesterday.”

    “Hahhk…, hah……?”

    Our bodies’ preferences are similar.

    There’s no other answer.

    “Huu… Fuck….”

    “Nghhk…, nghhk……, …hk….”

    “Jiyoon-ah. Can I move the pillow?”

    “N-No….”

    “Then you wanna keep doing it like this?”

    “Yeah….”

    “…I don’t.”

    He stops the shallow thrusts, buries himself to the hilt again, and grabs the pillow covering my face.

    I try to resist, putting all my strength into my arms, but I can tell instinctively—

    “It’s in the way. This.”

    “…Ah.”

    In this state, there’s no way I can win against Woojin.

    Unless I turn into solid ice, I can’t possibly overpower him.

    …I have no idea what it means for a woman to lead during sex.

    Just getting fucked deep is enough to make my vision go white and my tongue tangle.

    What kind of pathetic guy would you have to fuck for a woman to take control?

    Every time Woojin presses against my cervix,

    My mind fills with nothing but question marks,

    And I just don’t get it.

    “…You drooled all over it. What, you sleep with this pillow too…?”

    “…”

    “Your arms. Not gonna move them? You can’t even cover much with them anyway.”

    “…”

    “…Fine. If you don’t wanna answer, don’t. Makes it easier for me to imagine noona anyway.”

    “…Ngh….”

    Under the arm covering my face.

    His tongue touches my lips, busy gasping for air.

    I don’t hate it, but—it’s… embarrassing.

    So embarrassing that I try to shake my head to push him away, but when his thrusts grow rougher below, as if telling me to behave, I can’t do anything.

    All I can do is let out moans that don’t even sound like me and obediently let Woojin lick my lips.

    After panting against his mouth like that a few times,

    …My arm, the one in the way, gets yanked up roughly,

    “…”

    And my completely melted gaze is exposed to him.

    “…Open your mouth.”

    “…”

    Like it’s the most natural thing,

    We kiss while fucking.

    “Chu…, ngh…, hff…….”

    That’s all it is.

    With both wrists pinned, reduced to nothing but a fleshlight,

    Only one thought crosses my mind.

    “…Hff…, ngh….”

    “…Hff… …Lee Jiyoon… Lee Jiyoon…”

    “…Hey, why’re you suddenly fucking… harder…, nghhk….”

    …This kind of thing,

    Unnie would probably love it.

    But,

    I think—

    I do too.

    Because I take after her.

    “Huu… Fuck….”

    “…Ah…? Your dick, it got… bigger……, …chu…….”

    “…”

    “…! …, ……?! …!”

    “…”

    “……, ……….”

    Secretly,

    I think I like it quite a bit.

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