Chapter Index

    .

    From the looks of it, Lee Jiyoon is already dead set on enjoying my cock as depravedly as possible in front of her sister.

    Thanks to her, we even ended up having sex in the house where Lee Hayoon was present…

    The only thing left now is to reduce Hayoon’s discomfort—she’s still hiding behind that tightly closed door over there.

    After stretching my stiff shoulders lightly and letting out a satisfied sigh, I walk toward the fridge.

    It’s a bit of a cliché thought, but I feel like we’ve come a long way from being practically strangers.

    So it’s only natural that I’m looking forward to what comes after graduating from the academy.

    By then, how far will I have gone with these two?

    Faces hidden,

    Barely recognizable figures,

    Posting photos in some online community,

    Cosplay.

    Photoshop.

    Feeding off the heated reactions of fans arguing over whether it’s deepfake while deliberately leaving out the truth,

    Locked inside the house 24/7,

    Even cutting back on sleep just to have sex.

    Well… that doesn’t sound too bad.

    “Huu….”

    Anyway.

    I don’t remember much about Hayoon.

    But Jiyoon… it took her about seven months to get famous, I think?

    Humming lightly, I open the fridge and pour myself a full cup of cheap barley tea that fits the vibe of this place.

    The only thing left on my bucket list is reducing Hayoon’s resistance to a threesome.

    Since it’s practically the last hurdle, just thinking about it makes it seem like an absurdly difficult challenge.

    If they were complete strangers, maybe it’d be different, but no one would casually choose to share a bed with their own sister.

    Still, I can see a potential breakthrough.

    The downside is that it’s not a surefire solution—

    More like a tiny hole I’ll have to squeeze through with great effort.

    But since it’s not impossible, I have no intention of giving up.

    I’ve already died and come back to life, so I’ve got this vague confidence that I’ll make it work somehow.

    Gulp, gulp.

    The keyword is jealousy.

    At first, I tried to take advantage of Hayoon’s bright and kind personality,

    But this morning, the excuse “I’m being lovestruck by Jiyoon” worked surprisingly well.

    And just a while ago, because Jiyoon was subtly needling her sister, the plan almost derailed,

    But in the end, it resulted in Hayoon handing me three condoms as if telling me to go for it.

    Looking at all this,

    Instead of exploiting Hayoon’s kindness,

    …Playing with Jiyoon, who’s already lost to her lust, also seems like a pretty good idea.

    “….”

    I thought that kind of jealousy would only work on Jiyoon, not Hayoon.

    …Maybe because they’re sisters?

    Their faces and heights are similar,

    Their personalities,

    Their hobbies.

    The only thing I thought was noticeably similar was their green eyes, but—

    Turns out they have more in common than I expected.

    “Hmm….”

    So when and how should I coax Hayoon?

    If I come back tomorrow, maybe I should leave the door slightly open instead of closing it completely?

    Or should I let her hear us going at it in the living room?

    …Ah, right.

    Since Jiyoon used a cheap trick to get Hayoon to hand over the condoms,

    Maybe I should fill one up with even more cum than usual and show it to her.

    Click.

    Just as I’m pouring a fresh glass of water for Jiyoon, Hayoon suddenly pokes her head out from behind the door.

    Her head is tilted at an angle over 45 degrees, making her usual ponytail sway gently below her cheek this time.

    Seems like she heard the sound of the fridge opening and closing.

    “…Did you? With Jiyoon?”

    “…Ah, uh, …yeah.”

    Instead of a greeting, she asks about my progress with her sister.

    I feign awkwardness and stammer out a reply, and her green eyes fixate on me.

    More precisely, on my lower stomach.

    No, a little further down.

    Right where my cock is—

    Still glistening with the mix of cum and her sister’s juices after ruthlessly grinding against her walls.

    “…You must’ve really enjoyed it. …Jiyoon.”

    “….”

    “Well…, …she likes you too, just like I do….”

    “….”

    …My heart skips a beat for a second, but Hayoon remains eerily calm even as she stares at the white streaks of cum.

    I let out a quiet sigh of relief as I watch her reaction.

    Since she doesn’t immediately ask if we did it without a condom or anything like that…

    She probably doesn’t even realize it’s cum.

    At most, she might think it’s just Jiyoon’s fluids, dried white from friction… right?

    But in reality,

    This means I fucked her sister raw.

    “…I-I saw, um… down there. It’s… covered in stuff….”

    “…Ah, this.”

    “…Yeah.”

    “…Sorry. I just came out to drink water after taking a short break.”

    “….”

    “Ah, why’d you come out, noona? Thirsty too?”

    Luckily, she seems to interpret my frozen tension as just not understanding her.

    I turn slightly to hide my cum-stained cock and quickly change the subject.

    “I just… wondered if you were done. …Sex.”

    “…We’ve only finished once, so we’ve got two more rounds to go.”

    “…Only once? You’ve only done it once so far?”

    “It hasn’t even been 20 minutes yet.”

    “…Huuung.”

    Hayoon puffs out one cheek like she’s dissatisfied with something.

    I can’t help but wonder if someone who acts like this is really an adult—

    But before I can finish that thought, Hayoon stretches out her arm and waves at me to come closer.

    …But walking over with my dick still dripping cum is risky.

    Covering about half of it with my hand, I walk over with an awkward expression.

    “…Hey, hey. Woojin.”

    “Yeah?”

    “I’m not rushing you or anything… but, well….”

    “….”

    “You said an hour, but… you might run out of condoms before then, right?”

    “…That’s true.”

    “…Ah, not that you’re enjoying sex with Jiyoon too much or anything… just, you know, you don’t really feel like holding back… Hahaha….”

    “….”

    Jiyoon probably plans to stretch it out for the full hour.

    And of course, I was planning to use all that time too.

    But as I step closer to the door, looking at Hayoon, who’s still peeking out while chattering away, I nod.

    …Because,

    I don’t have a choice.

    “…A-Anyway! If you finish up quickly with Jiyoon….”

    Her voice is as bright as usual.

    She’s terrible at lying.

    Too cute to treat like a proper noona.

    If you took Jiyoon’s usual stiff, expressionless face and swapped it with a default setting of a beaming smile,

    This is exactly what she’d look like.

    That’s Hayoon.

    “…Ta-da.”

    Not just her face—she opens the door a little wider, letting me see a bit more.

    …Hehe.

    How is it? Pretty, right?

    She makes that face while wearing what I assume is her old high school uniform.

    Now that I look closely, it even has a properly attached nametag that reads “Lee Hayoon.”

    It’s the same one I’ve seen local high school girls wearing a few times.

    And now,

    Behind her sister’s back,

    “…I’ll wear this… and do it with you. How about it?”

    “….”

    “….”

    “….”

    “D-Don’t just stare, say something…! You don’t like it…?”

    “…You told me to finish quickly earlier.”

    “Yeah. …Ah, no, I mean….”

    “….”

    “…Yes. …Oppa.”

    She’s—

    “…Actually, um….”

    “….”

    “Do you prefer… if I call you ‘sunbae’ instead…?”

    —tempting me.

    .

    .

    .

    And,

    “….”

    “….”

    …With her little sister undoubtedly listening quietly from behind the door,

    Knowing it’ll provoke her like crazy,

    I had no choice but to nod.

    Like I thought, jealousy.

    It’s way more effective on Jiyoon than on Hayoon.

    …Plus, after our first raw sex,

    And even that fake “I like you” confession,

    She probably thinks she’s somehow won against Hayoon,

    So it’ll also work well to keep her from getting too comfortable.

    “…I wondered what you were talking about with unnie outside all of a sudden….”

    “…Ah, you heard?”

    “The soundproofing is shit, so I heard everything, dumbass. …And you didn’t even close the door properly earlier.”

    “….”

    “…You fucking pervert. What’s so great about unnie’s uniform…? Your dick’s all hard again….”

    See?

    Like this.

    “Here. Drink the water. You said you were thirsty.”

    “…‘Oppa.’ Ugh. Hearing it directly is so gross.”

    “But she’s your sister, so it’s gross…?”

    “Because she’s my sister, it’s gross…! Ugh…. Aren’t you embarrassed saying that? You’re a year older than Seo Woojin!”

    “Just drink the water.”

    “You into that? Cosplay? Stuff like this?”

    “…Dunno. Don’t hate it. If the girl’s pretty.”

    “…Fucking pervert.”

    Just a while ago, she was moaning so much that every time I rammed into her cervix, a handful of her juices would soak the sheets,

    But now, as if none of that ever happened, she plops down on the edge of the bed, making a face like she’s about to puke.

    I almost ask her what she thinks about “having a fetish for her sister’s boyfriend,” but I swallow the words and approach the bed instead.

    It’s fine.

    Even if she acts like this…

    If I tell her to spread her legs, she’ll curse at me while tensing up,

    But eventually, she’ll end up getting fucked senseless,

    Then cover her face with her hands and dirty the sheets again.

    No need to worry too much.

    She’s all talk.

    All talk.

    “Give me the condom you left by the pillow earlier.”

    “…You really wanna fuck unnie in her uniform?”

    “Yeah.”

    “So, you’re saying you’ll have sex with me?”

    “You don’t want to?”

    “…Lolicon. Pedo. I hope you get flagged by the laws and arrested. Seriously.”

    As Jiyoon hurls insults, she subtly leans back onto the bed.

    Climbing onto the bed beside her while she’s still fuming,

    I take the condom she tosses at me like it’s trash and roll it onto my still-damp cock, wiped clean with a wet wipe.

    “….”

    …But,

    Just because she handed me a condom doesn’t mean she’s willingly spreading her legs.

    While I’m clumsily fitting the wrinkled condom over myself, Jiyoon isn’t lying down waiting—

    She’s sitting.

    Perched on the edge of the bed, staring holes into me as I put on the condom, waiting.

    …I thought for sure she’d pounce on me, bragging that she could make me feel better than her sister.

    The fact that she’s just watching from the side like this means—

    Probably.

    “…What are you doing. Jiyoon.”

    “What? …I was planning to do it like this from the start…?”

    With a mischievous smirk, she scoots right up next to me.

    For a moment, I see Hayoon in her face.

    Squelch,

    Squelch.

    Between Jiyoon’s fingers gripping my cock,

    A sticky sound starts.

    …And overlapping with that,

    Naturally,

    Is Jiyoon’s voice.

    “…You don’t look happy. Hehe… Wanted to put it in here?”

    “….”

    “Ah, you can’t see it properly from the side, can you?”

    “….”

    “…Here, someone already fucked it so hard it’s all loose now.”

    “….”

    “Even if it’s a 20cm ultra-thick dildo…,…you could shove it all the way in.”

    She grips my slightly softened cock with two fingers.

    …Positioning them just below the head to stimulate it,

    Then in one motion,

    All the way down to the base.

    Pulling so hard the condom stretches taut over the tip.

    …Where did she learn this?

    With one palm,

    Rubbing so hard my tip tingles,

    Enough to make me worry the condom might tear.

    “…Feels good? Idiot?”

    “…Not as much as sex.”

    “…Ah, your hips twitched.”

    “…So what?”

    “Pfft… I learned something, you know? Just now, your hips, and… when your cock suddenly starts trembling, it means you’re about to cum.”

    “…I’m not a two-pump chump. No way I’d cum just from you touching me for a bit.”

    “Then what was that reaction earlier? Your balls were twitching like crazy… Super suspicious.”

    “…That just happens when it feels good. …You wouldn’t know, since you’re a girl.”

    “…Hmph.”

    From the moment I brought up her sister.

    No, from the moment she heard me talking to her sister in the living room.

    She never planned to have sex with me,

    …Just to satisfy me with a handjob.

    As if that would be enough.

    Now, settled comfortably between my legs,

    Kneeling quietly,

    With a playful, hehe smile,

    She pokes at my lower stomach with her fingers.

    “…You look desperate.”

    “…I’m not.”

    “Your cock went soft for a second, then got hard again.”

    “…That’s nothing.”

    “Ah. So you don’t wanna cum?”

    “….”

    “You don’t wanna cum, right?”

    “….”

    Jiyoon’s hand, small compared to mine.

    With her thumb and index finger wrapped around my shaft, slick with lube, the sound of squish, squish, squelch doesn’t stop.

    Compared to a fleshlight,

    Or just regular sex,

    The visual might not be as good,

    …But in one aspect—

    The pleasure—it doesn’t fall short at all.

    My thighs keep tensing up.

    “Not enough? Want me to stroke faster?”

    “…No. Just…, …just keep going like this.”

    “…Hmm. Nah. Can’t help it. You said fucking unnie in her uniform is more important than fucking me….”

    “…Hey, shit….”

    “I’ll help you cum as fast as possible?”

    “Ngh….”

    While her hands work busily,

    Her soft tongue starts lapping at my tip,

    …And it feels,

    So fucking good that,

    Without realizing it, I turn my head away.

    …I never expected,

    To be attacked like this by her.

    “…Eugh. Condoms taste like shit….”

    “….”

    “No choice. Let me take it off for a sec….”

    “….”

    I could’ve just told her to keep it on and stick to a handjob,

    But I’m too busy steadying my breathing,

    And I miss my chance to speak.

    “……Slurp, pah…, mmph….”

    …And then,

    My bare tip is,

    Being lovingly licked by Jiyoon’s tongue again.

    Below the swollen, throbbing head,

    The veins on my shaft pulse visibly as her small, soft hand,

    As if urging me to cum,

    Strokes eagerly.

    “…Sluurp…. …Mmph.”

    …If I end up cumming like this without the condom,

    It’ll be weird since there’s no vaginal fluids on it.

    It’ll work out somehow.

    Bracing myself against the bed with one hand,

    Huu—

    I let out a pleasured sigh,

    And let Jiyoon service me.

    “Sllrp…, ……. …Slurp…….”

    Ah. No.

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