The Art of Eavesdropping (2)
I’m keeping watch over the house all by myself. At this hour, I’d usually be busy playing games alone... or, since my sister isn’t here, I’d be wearing my headset and masturbating with all my might. Staring at the phone screen that reads 07:34, I listen to the sounds of my sister being loved, and I shove my straight, slender fingers deep into my own wetness, pressing down hard.
—...Puhap. W-wait a second...!
—...Why?
—It’s unfair that I’m the one naturally ending up on the bottom... ugh, it’s unfair...!
—Unfair... Then what do you want to do?
—What do I want to do... Ugh.
She flops onto the bed as if performing a dogeza. I bury my long, thin fingers all the way into that sticky, warm hole, curling my fingertips like hooks to roughly and diligently scrape against the vaginal walls.
—Nng... mph, mph... phuu...
My body shudders with a light climax, face buried in the bedsheets. After a moment, I grab the blanket I’d pushed aside, bunch it up beneath me, and crawl on top of it, squirming just like my sister is doing on the other end of the phone. Those two are probably tangled up in a position just like this.
—Phu-heung... As I thought, there’s nothing special about being laid out flat.
—...Are you happy because you beat me once?
—Yeah. Totally happy. How is it? Do I look a bit more like a big sister now?
—I don’t know. I’ve never really felt like you were a big sister, even on normal days.
—Ha?
—Oh, you’re the first person I’ve ever heard say that for real.
My sister bristles like a cat, clearly displeased with Seo Woojin’s answer. Unlike her, Seo Woojin sounds strangely gentler than usual. He was so aggressive when he was having sex with me in this room, yet he’s quite tender in front of his girlfriend. Listening to the two of them cooing—voices I feel like I understand, yet don’t—I roll up a wet towel and stuff it between my crotch and the blanket.
—...Hmph. Looks like I’ll have to punish you myself, Big Sister...
—Is that a line you saw in some manga? Why are you talking like that?
—Sh-shut up...! I’m not copying anyone I saw...!
—Yeah. Now you sound a bit more like Hayoon-nuna.
—Grrr...
—Puhaha. Look at that face.
I use my fingertips to mercilessly scold my clitoris, which is already slick with arousal and hardened to the point of aching. Seo Woojin is lying on the bed, his upper body slightly raised. My sister is straddling him with a confident expression. Seo Woojin is smiling brightly at her. My sister, looking at him, starts to pout and hiss like a cat again, her ears flushed red. I weave the delusions I’ve conjured from their voices into a messy tapestry in my mind, scattering my own fluids all over the wet towel.
When Seo Woojin is with me, we don’t have conversations like that; we just have tons of sex. Maybe if we’re showering together in the bathroom, that’s one thing, but on the bed, he just slams his lower abdomen against my ass over and over until his lust is fully satisfied. Does the fact that he’s spending such a tender time with my sister mean that I—that my body—is more arousing than hers? ...Hehehe.
—Nuna. It’s okay to just hold each other, right?
—You’re trying to treat me like a doll, aren’t you...!
—No. I’m treating you like my girlfriend.
—W-what...
—...I shouldn’t have turned the lights off. It’s a waste to only have the nightlight on.
—Why turn the lights on, it’s embarrassing...!
—Because your face gets really cute when you stutter.
—...
They say there’s such a thing as "loser masturbation." This is a bit different from that. This is... wouldn’t "winner masturbation" be a better term? Yeah, yeah. That’s it. I kissed him before she did. I had sex with him before she did. I enjoyed everything before she did, and now I’m masturbating like this... It’s not a pathetic act soaked in defeat, but masturbation performed while buried deep in the dopamine of victory. Yes, it’s winner masturbation.
—Mph... phuaa... Ah, wa—
My sister, unable to keep her head straight, starts kissing Seo Woojin as he pulls her into his arms. I imagine her fluttering ponytail, the wet, squelching sounds that will soon be hammered into her brain, and her ears, which must be dyed bright red, as I press and scrape deep inside myself.
—Hey, hey...! Why do you keep kissing my neck, it tickles...
—...Do you hate it? We showered together earlier, too. ...Ah, the marks won’t show anyway...
—It’s not that I hate it... I just... I prefer it when you kiss my... lips...
My sister’s shampoo scent, different from usual. My sister’s body wash scent, different from usual. Knowing in advance that the scent I’ll be smelling soon will be Seo Woojin’s... I let my fluids drip from my vaginal opening, held wide by my V-shaped fingers. If I approach my sister when she gets back and sniff her, how will she react? She’d definitely be startled and run away to her room, right? If I pressure her about the shampoo scent, she’d probably try to dodge my gaze and make excuses. Her reaction is so obvious, I want to tease her already...
—Nng-mph... hup... mph...?! Phuu, ph—
While I was continuing my delusions, mercilessly scolding my clitoris with my fingertips, I heard a sound mixed in with the squelching—the sound of paper being crumpled. At first, I wondered what it was, but it didn’t take long to realize what it was. My sister and Seo Woojin. If they keep kissing, what will they end up doing? They’ll have sex. Obviously.
—I’ll take your shirt off, so stop hugging me and spread your arms a little.
—...
—Come on. Thinking about it, you put your clothes back on because you were embarrassed, right?
—...
—...That’s it. Like that.
A shirt? What was my sister wearing? Ah, right. The Academy uniform. She went out without changing. At the same time, my gaze, which had been buried in the blanket, shifts briefly to the clothes hanger on the wall. If I have another "sex practice" session with Seo Woojin next time, should I wear the uniform on purpose? To make him remember the first time he had sex with my sister. And eventually, he’ll have no choice but to compare me to her without even realizing it. Honestly speaking... I don’t think I’ll lose to her.
—Are you going to keep your T-shirt on?
—...U-uh...
—It’ll be uncomfortable. The smell will soak in. Your underwear will chafe, too.
—H-how do you know that? Are you a girl?
—I’m just asking, just in case. Because if you go home and Jiyoon smells all these different scents on you, you’ll be embarrassed.
While I was imagining a sweaty, squelching uniform-sex session with Seo Woojin, my name was suddenly mentioned over the phone. All my attention, which had been idly drumming against my eardrums, focused entirely on the call.
—She, she’s probably playing games in her room even if I go home, so it’s fine...
—Still, you never know. The timing might be right, and she might come out to greet you.
—...Well, sometimes that happens, but... ugh...
That, that is definitely him saying that because he knows I’m listening. He’s telling me not to come out of my room, knowing full well that my sister will be returning home covered in the scent of sex.
But why? It feels like he’s saying, "I’m going to mark your sister by fucking her thoroughly before I send her back, so come out and smell it while you’re at it." Why? Is it just because I’m a pervert? Really?
—Otherwise, I have some of my clothes here, so you can wear those.
—...Your clothes?
—Yes. Do you hate it because the size won’t fit? It might be a bit big, though.
—N-no, I’m not. I want to wear those...
—You’re more obedient than I thought this time.
—It’s a guy’s fantasy, isn’t it... A girlfriend wearing her boyfriend’s shirt... something like that...
—...Ah, that’s what you meant.
So much for guessing Seo Woojin’s intentions. Instead, he’s having her change out of the clothes I was imagining her in, and into his own, slightly baggy garments. Looking at her appearance, she’s definitely on the cute side, so a "boyfriend shirt" style would suit her well, just as she said. If not that, a big boyfriend sweatshirt. Or a flowy boyfriend pajama set. That would be nice, too. Then next time, I’ll have to steal Seo Woojin’s infirmary gown. Just as my sister’s scent is soaked into his everyday clothes, when he’s at the Academy... I’ll make sure he smells plenty of mine.
—Here. Wear this. It definitely looks big, but... it’ll suit you.
—...
—...Should I keep my eyes closed?
—...Yeah.
I wonder what clothes my sister is wearing. I wonder what clothes she’s wearing while she gets fucked by Seo Woojin. Does Seo Woojin like it as much as he does when he has sex with me? While he says it feels good, will he secretly... let out a sigh full of disappointment? "It felt so much better when I was having sex with Lee Jiyoon..." something like that. While thinking thoughts like that, I use the rustling sounds coming through the receiver as a side dish, scraping my vaginal walls with such intensity that I feel like I might stop breathing. Then, at some point, the tossing and turning stops.
"...Eh."
Thinking the call might have been cut, I stumble to my feet to check, but that wasn’t it. The phone screen just shows the time, 10:22, ticking away. What is it? She was just about to go over the edge, so why suddenly... Is it a problem on their end, since I’m fine...? Maybe the battery is dead? Hmm... but then shouldn’t the call have ended? ...Ha. I don’t know. I’ve never really talked on the phone with others enough to know. I’m basically just a machine for watching YouTube, so how would I know?
I let out a sigh full of regret and lightly sweep my bangs back with one hand. It’s because my hair got a bit messy from burying my face in the bed and masturbating so hard just now. I was just glancing between the towel and the computer I hadn’t turned on yet, instead of the phone that had been full of such lewd sounds.
—Ugh, h-hick... w-wait...
On the other side of the phone, the squelching sounds started to ring out again. But it’s a little different from before.
—...Your legs. Spread them a little more.
—...I-isn’t this enough...!
—I’m saying this because my wrists feel like they’re going to break.
—That’s, that’s just...
—...Your thighs. Spread them.
—W-wait a second...
Unlike a moment ago, when it was noisy with what were clearly kissing sounds, this time the squelching noise doesn’t stop even while they’re openly talking. So, Seo Woojin is probably hugging her from behind... Wow, that sound...
—...Is this why you said you wouldn’t take your panties off earlier?
—No, that, ugh... no, that’s not necessarily it...
—Why? You’re already fucking soaked, it’s so arousing.
—Ugh... h-how is that arousing...! It’s embarrassing that I’m so... fucking soaked...!
—It’s not just from kissing me, is it? ...Because you want to have sex.
—...Ugh...
Just how soaked is my sister to make a sound like that? Even I, who am soaked enough to have it dripping down my thighs, and who am busy scraping my vaginal walls while eavesdropping on their conversation, don’t make squelching sounds that loud.
—...Bite the hem of my shirt you’re wearing with your mouth for a second. So it doesn’t get in the way.
—...
—Hurry.
—I-I’m holding it with my hand...
—Bite it with your mouth.
—...H-hup...
Yeah. You’re doing well. My sister likes it when things are forceful. The porn I caught her watching was full of dicks being shoved in without mercy, so she must like that kind of thing. As proof, she’s moaning, "mph, mph," while biting the shirt. Besides, hearing the tiny, wet popping sounds mixed in with the squelching, her thighs must be trembling, right? Hehehe...
—...Hoo... Lee Hayoon, seriously...
—Phu-hek... heh... heh...
—Wait a minute... The drawer, fuck...
I imagine that the fingers scraping my vagina right now are Seo Woojin’s. That the blanket filled with my scent is Seo Woojin’s embrace. At the end of my masturbation, fueled by those delusions, Seo Woojin starts to let out a voice filled with excitement toward my sister. I fuck my pussy hard, using his voice as fuel. Pretending that even that voice is being poured out for me.
Squelch, squelch.
—This condom pack has 3 in it, right? ...Okay?
—Con... ugh, yeah...
—I have more than just this. How many packs should we use? ...Today.
—...
No. You idiot. If he had pushed her to do it raw without any of that, she would have pretended to hate it, pretended she had no choice, and then accepted it. As for pregnancy, she could just take her birth control pills properly. Once she unlocks the "no-condom sex" achievement, everything after that...
—U-um, hey...
—Why?
—H-how many... packs... do you have... ...okay?
—...?
—Y-you just used informal speech with me...! You used it... ...okay?
—...
—A-anyway, how many packs do you have... ...okay?
—Enough to last all night.
—...Ah, aha.
—...
—H-hey. Wait a second...
...Lee Hayoon. That crazy bitch. So that’s the kind of play they do when they’re alone. Calling him "Oppa" on the street earlier, she could only do that because she’d already done it. Just as I was rubbing my clitoris with the tip of my middle finger, my phone vibrated noisily.
"..."
...Lee Hayoon. That crazy bitch.