Chapter Index

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    …The girls were like that in high school.

    That Seol Da-bin, doesn’t she look like a total sl…ut?

    Of all times, it was when I was using the bathroom, and they were excitedly gossiping right outside the stall?

    Did you see her fishing in front of so-and-so during break? Or something like that.

    Being subtly close, wasn’t that on purpose? Or something like that.

    The guys were saying Seol Da-bin is just someone to sleep with, that their brains are in their dicks, gossiping like that.

    They were saying I’m the type to poke at any decent-looking guy and then choose based on vaginal compatibility, happily chatting among themselves….

    …Sigh. Idiots.

    It wouldn’t have happened if they had just asked if I had a boyfriend.

    Well, anyway.

    Of course, I was angry at the time, but I didn’t want to make a big deal out of it….

    So, I ended it with an appropriate response.

    After that, I just looked at them like bugs and didn’t say anything.

    “…This is the best you could come up with?”

    “…Shut up.”

    “Well, it’s been a while since Lee Ji-yoon has been this active. I like it….”

    “I told you to shut u…, …hey, don’t rub that on my face.”

    “I’m getting impatient.”

    “……Okay. Geez….”

    “…….”

    “…It’s already rock hard…….”

    Something I keep realizing these days.

    Those things they said back then.

    At the time, I was disgusted because it was all lies.

    …But now that I think about it.

    For sure.

    It’s not entirely wrong….

    I don’t think it’s wrong.

    “…Okay, are you done?”

    “Done with what? …All you did was kiss the tip of my dick?”

    “No…. …Senior… is here too….”

    “Then I’d rather just ask Seol Da-bin, so you….”

    “Ah, I get it. I get it…!”

    “You said you got it earlier?”

    “I really get it now…! So…. Haah….”

    “…….”

    “……Just do a proper fellatio even if it’s embarrassing.”

    I don’t like being judged on my appearance…, but.

    All the actions I’m doing here right now.

    …That’s right.

    A slut.

    It’s not entirely wrong, is it?

    Even if I’ve learned what it feels like to be loved thanks to Seo Woo-jin,

    He’s Ha-yoon’s boyfriend.

    …With that kind of person.

    With a friend’s younger sister.

    In the same room.

    Behind my friend’s back.

    Doing this kind of thing.

    There’s no room for excuses,

    X.

    “…Um, mmm…, chuup…… ….”

    My right foot, diagonally in front.

    There, kneeling obediently, tilting her head and sucking Seo Woo-jin’s dick, Ji-yoon.

    …Not his girlfriend, Ha-yoon,

    Ha-yoon’s younger sister diligently serving Seo Woo-jin.

    Looking down at it fleetingly with a decibel 0 voice.

    “Seol Da-bin.”

    Seo Woo-jin calls my name.

    I snap out of it as if I’ve been caught stealing.

    “Hoo…. This. The thing that’s hanging on your chest.”

    “…….”

    “I’ll take it off properly, so raise your hands.”

    Just taking off my clothes.

    It’s a common occurrence when I stop by Seo Woo-jin’s house.

    So, there’s no need to be particularly conscious of it.

    …There isn’t.

    Unlike usual, there’s another person here today.

    Usually, I wouldn’t think anything of it, but I nod reluctantly,

    And Seo Woo-jin kindly takes off my clothes.

    All the clothes I wore to look pretty.

    With one hand.

    In one go.

    “Peuh…. Heu……, …eup, chwup….”

    …Of course, as for my gaze.

    Still right in front of my right foot.

    Kneeling demurely, that hideous dick.

    Full of anger, veins standing out all over the place.

    …Only swallowing about half of it,

    Spitting it out.

    Busy licking it diligently with her tongue.

    Fixed on Ji-yoon, though.

    “Are you that bothered by it?”

    “…A, um, why, why?”

    “Lee Ji-yoon. I’ve been watching you stare at it.”

    “…If you put a lewd video in front of you, wouldn’t your eyes naturally go to it?”

    “Well, yeah, but.”

    “I’m just the same….”

    Of course, I’m bothered.

    Should I call it a vaccination?

    I did it with you and Senior Seo-yeon a few days ago,

    But it’s not something you can get used to so quickly.

    …Still.

    Regardless of how difficult it is to get used to, I know that this is what Ji-yoon called ‘something Seo Woo-jin likes’ yesterday.

    Simply sleeping with his girlfriend’s younger sister behind her back.

    Or having a sticky time with Ha-yoon’s best friend behind her back.

    Committing deviations with those two girls in turn.

    I know Seo Woo-jin likes all of that,

    But as I said before, I’m just not used to it yet.

    Because of that, I answer with a nonchalant tone,

    “…Phew, …Senior. Just a moment….”

    “…Huh?”

    Ji-yoon, panting and wiping the saliva from her chin,

    Joins our conversation.

    “…If, if Senior also licked it…. …I think this pervert would like it a lot….”

    “Ah, um….”

    “He really likes it when me and my sister do it together….”

    With a thin and delicate finger, she gently grabs my hand,

    Firmly, firmly.

    Let’s kneel here together.

    Let’s serve Seo Woo-jin together.

    I’ve done it with my sister too.

    …It’s hard to imagine that she’s the calm Ji-yoon I’ve been seeing for the past few weeks,

    Because she spat out those words.

    “Didn’t I tell you to make him fall for you?”

    “…So what?”

    “Are you trying to cooperate instead of compete?”

    “Compete…? Why would I compete with Senior Da-bin, not my sister? You’re a garbage bastard who cheats on my sister…, haah….”

    “…….”

    “…A double-edged sword who makes me have sex full of guilt…, you’re an unparalleled pervert…,”

    “…….”

    “…That’s what turns me on…?”

    I heard about how Seo Woo-jin and Ji-yoon ended up in that kind of relationship once before,

    But when the three of us are in the same place.

    Because she spat out those words clearly once again.

    “…Aren’t you going to do it? Senior?”

    “Th…, I’m….”

    “Ah, if you’re disgusted by my saliva….”

    “…….”

    “Here. The root hasn’t been touched yet.”

    “…….”

    “…Do you want this part, Senior?”

    Closing my lips.

    Preventing the sound of my pounding heart from escaping.

    In the end.

    “…Ahaha.”

    “Why, why are you laughing….”

    “No, no. It’s not that Senior is funny. …It’s because of Seo Woo-jin’s reaction.”

    “Reaction…?”

    “Look. Since Senior is kneeling down too, his dick is much harder than before….”

    “…….”

    “…He looks like he’s about to cum any second now.”

    Kneeling down next to Ji-yoon.

    Secretly wetting my dry lips with the tip of my tongue.

    “…Are you going to do it together? Senior Da-bin?”

    “……F, first of all.”

    “Then, as I said before, I’ll do the front part….”

    “…….”

    Just as I felt my lips were moist enough, Ji-yoon, who smiled faintly, began to slowly lick Seo Woo-jin’s dick.

    Instead of holding it in her mouth like before,

    Gently rubbing the glans with her soft tongue.

    Huffing and puffing out a moist breath,

    Even stimulating the protruding veins under the glans.

    If you want to get technical, it was only a more passive action than before, but of course, I noticed the reason.

    She’s being considerate of me next to her, making space for me to join in on purpose.

    …And Ji-yoon is going this far for me.

    It’s not right to just kneel here like this.

    “…Be…e…….”

    Leaning forward slightly.

    Squeezing in between Ji-yoon and Seo Woo-jin, in the narrow gap.

    …Seo Woo-jin’s dick, which has become dangerously hard,

    On the side of it.

    I put my tongue.

    “Haa…, ……eup….”

    Seo Woo-jin, I thought he had just finished showering,

    …Why do I start to smell a man’s scent again as I get closer to his dick?

    A faint man’s scent behind the light coffee scent.

    Because of that, I take a moment to organize my breathing.

    His erogenous zone, which is full of excitement and has bumpy veins,

    With my soft tongue.

    I carefully stroked it up.

    I learned that men are particularly sensitive to the glans,

    But that doesn’t mean you can’t feel anything here.

    Besides, when I stroke this with my fingers,

    I don’t just do the tip, but all the way here.

    I used to stimulate it properly by stroking it long and squeaking it.

    Watching this hideous thing properly.

    Licking, licking.

    Like a pet.

    “…….”

    …Ah,

    Does it feel good…?

    He just twitched his dick,

    You had the same reaction when I knelt here too.

    And usually, when I see him right before he cums….

    …He tries to hold it back and jerks upwards.

    In the end, bdeus, bdeus….

    A lot….

    “…Bee…, ……Haa….”

    That kind of reaction is already showing from just licking his dick for a moment.

    I’m a little amazed.

    It’s also a little fun….

    Before I knew it, I swallowed the saliva that was covered in his taste,

    Quietly pretending to catch my breath.

    I read the owner’s expression.

    “…….”

    …I can’t even notice that I’m looking up like this secretly.

    If you look at him putting his hand on Ji-yoon’s head and pulling her slightly as if telling her to swallow deeper.

    For sure.

    Ji-yoon must have been right.

    Seo Woo-jin would definitely like this.

    He’d be very excited about doing this with someone around his girlfriend.

    She told me as if it were obvious.

    “Hoo….”

    “……Peuhap, chwup…, eup….”

    “…….”

    So, like this.

    The scrotum… too.

    It’s full.

    It’s heavy, as I can tell as soon as I lift it up slightly with my hand.

    …That means he’s working hard to create that sticky stuff.

    “…Why are you touching that so much.”

    “…You said it was okay if I touched it gently last time.”

    “I’m not saying to be careful, I’m asking why you’re touching it.”

    “…You always touched my breasts as you pleased. You were pinching them just now too.”

    “That’s the same…, no, never mind.”

    “Looks like you have nothing to say?”

    “Yeah. I’ll admit it, but just….”

    “…Then is it okay if I keep touching it?”

    “…That doesn’t exactly make me feel good when you touch it. It doesn’t make me feel bad either.”

    “Then…. …Should I not do it?”

    “…….”

    “…….”

    “…Do as you please.”

    In front of Ji-yoon, who is diligently sucking the tip of his dick.

    Unlike her.

    Silently touching the root of his dick with my soft lips.

    “Eut, eup…, peueh, hehe…. ……Eup….”

    “……. ….”

    …Hoo, hoo.

    Breathing slowly on this dick that’s about to burst,

    With my fingers,

    Fumbling.

    After stimulating his scrotum, which also looks full,

    “……Haeup,”

    If it’s okay, I wondered about this.

    I lowered my head under his dick myself.

    …I put my mouth on the scrotum, which was slightly touching his pants.

    Very awkwardly.

    I was doing something like serving….

    “…Ah.”

    Not even 30 seconds had passed.

    Without saying anything.

    …He started twitching tremendously.

    Tweh,

    After spitting out the scrotum that was touching my lips, I moved my gaze to the side.

    “…Eup, peu…….”

    Gulps,

    Gulps.

    Gulps.

    I can see Ji-yoon continuing to swallow something.

    …Actually, what else could it be?

    Until just now, it was touching my lips….

    It’s clear that there was a lot of it inside.

    “…Phew. …Hey, take it easy…. Eut….”

    Look.

    What’s dirtying Ji-yoon’s face right now,

    What’s dirtying Ji-yoon’s white hair all over.

    …It’s cum, right?

    To a woman who isn’t his girlfriend.

    Especially to his girlfriend’s younger sister.

    A liquid that should never touch.

    …Right?

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