[Eavesdropping]
Beep. Beep.
The ringtone echoed quietly. I, who had been in the middle of boiling ramen, carefully picked up my phone. The caller ID, even after a second look, was Seo Woojin. And not the Seo Woojin from when things were normal, but the one who was obviously on a date with my sister. Not the Seo Woojin asking when I’d be logging into the game, but the one who had ditched me to watch a movie with her. Not the Seo Woojin who rolled around with me while I pretended to be my sister for "sex practice," but… the real one. The Seo Woojin who was actually going to have sex with my sister this time.
"……."
Why are you suddenly calling me? I mean, I’d been back home masturbating… and the movie should have ended ages ago. Why on earth?
"…What, are you planning to make me run an errand for an umbrella or something…?"
I muttered grumpily and glanced at the window, but there was no sound of rain. Instead, the only thing pounding against my eardrums was the sound of the ramen broth bubbling and the colorless, odorless default ringtone. It wasn't an umbrella errand, it couldn't be a call asking when to play games, and it certainly wouldn't be a pointless call like "What are you doing?"
What is this?
"…Did you mean to call my sister and make a mistake?"
Yeah. That actually seems a bit more likely. Having settled on that, I let out a listless sigh and turned off the stove. For example, maybe… they were distracted during their date and lost track of each other. So Seo Woojin tried to call my sister, and it happened to be me, whose number only differs by the very last digit.
If it’s not that, why would he call me…? ……Ah…. …. …Pfft. No way.
There’s a limit to delusion. Mm-hmm. At my age, why am I thinking of a situation straight out of a scripted adult film? That kind of thing doesn't happen in reality, and I’ve used it as "side dish" material hundreds of times since I was in middle school, so I’m already sick of it. Even if someone told me to masturbate to that now, I wouldn't even be turned on. If it were a video where the sister is sleeping next to them, and the younger sister is forced to keep her mouth shut, only hearing the thump, thump of the bed creaking, with sticky fluids flowing between her thighs—that might be different. If, in the end, while clutching the man’s neck and trembling with chills, they just kept going without a single word, with thick semen flowing from the point of union… that might be decent material.
"…Hmph."
Anyway, it’s a ridiculous delusion even to me. Seo Woojin calling me on purpose while on a date with my sister? Puh-hah. I’m not some middle or high school girl with a raging sex drive. It’s funny. So funny.
"……."
That can't be it. Are you stupid? Keep the perverted delusions to a limit. I thought, treating myself like an idiot.
"……."
On the phone screen. I gently pressed the green button. Well… you never know, right? Without even a shred of expectation, I tapped it.
Then, the numbers 00:00 appeared on the screen.
"……."
…Soon, it grew to 00:01. Then 00:02.
"……."
No "Hello" or anything like that came through. So, I didn't say anything either. It wasn't because of some ridiculous reason like not wanting to be the first to greet someone. …It was because I couldn't let my voice leak over to that side. I could have just touched the 'mute' icon. I’m such an idiot.
Time passed with the phone pressed firmly against my ear. My sister’s voice. Seo Woojin’s voice. The sound of the ramen I’d just boiled going cold. And beyond that. …The sound of wet, squelching friction echoed endlessly.
"That was… a difficult movie."
"It really was."
"I mean, in the end, it was a… doppelganger? Right?"
"Who knows. I dozed off a bit while watching it."
"…Ahaha."
I picked the wrong movie…! After the screening, I stopped by a cafe with Woojin and let out a deep sigh while drinking my coffee. No, they should have at least put some proper space suits on the poster. I arrived at the theater without any plans and picked it based on ratings, but I never imagined it would be an SF documentary. Haaa… everything is ruined because of that.
I wanted to reach for the popcorn together, have our hands brush against each other, huh? Then maybe we’d share an awkward laugh. Maybe take advantage of the darkness to interlock our fingers. Make some eye contact. After creating that kind of suggestive atmosphere, I was going to smile confidently and say, "…Should we take a break, Oppa?" and lead him there.
But all I did was nod off and lean on Woojin’s shoulder. Even if things might be different in bed, I wanted to lead him like a real older sister for once, just as much as he’s teased me… but one bad choice turned it all into bubbles.
"Don't you want to eat dinner?"
"…No. The popcorn made me full…."
"See. I told you not to eat so much popcorn before going into the theater."
"But…."
"If you hadn't eaten it before the movie started, it would be one thing, but you ate more than half of it right then…."
"It was salty and delicious, what was I supposed to do."
"You said you liked sweet things last time."
"Last time? Well, if it’s delicious, I like it all. Whether it’s nutty, sweet, salty, or spicy."
"Hmm."
"……."
As I sipped my coffee and looked at Woojin in front of me, I noticed he had a knowing smile on his face. How should I put it… it’s closer to the look he gives a cute younger sister rather than the look he gives a cool hero older sister. Even if I match his tastes to some extent when we have sex, shouldn't he treat me like an older sister in everyday life…?
Even earlier, huh? He asked me to call him "Oppa" in the middle of a crowded street. Save that kind of thing for when it’s just the two of us. …If I’m in a good mood, I’ll play along a few times as a service.
"Don't look at me like that. Ugh…."
"What do you mean?"
"You're looking at me like, 'Oh, you're doing so well!'"
"…Ah. It was a bit like that, wasn't it."
"You know it, so why ask…!"
"Because you're cute when you're angry?"
"I'm not cute…! I'm not cute…! Stop gaslighting me by saying I'm cute all the time!"
"Gaslighting doesn't end with just this much."
"What, you talk like you've actually done it?"
"I haven't done it… I’ve just picked up a few things from the internet. It’s such a famous term, after all."
I kicked his shin with the tip of my foot, but all I got back was that same soft smile. Watching him, I eventually clicked my tongue and sipped my coffee. God. How should I break through this situation? How on earth can I get Woojin to treat me like an older sister instead of a younger one?
Should I use some old-fashioned, naggy language? No, no. He’d probably find that slightly annoying. And showing off my cool side catching criminals isn't something I can just do on command. …Is it really that? My charm as an older sister. In other words, showing off my charm as an adult woman.
"……."
I scanned the cafe for a moment, confirmed there were no eyes on us, and took off my coat, folding it neatly beside me. All that remained was my fleece with the zipper half-down. And my academy uniform that clung to my body. …Because of that, my soft brea— …breasts, which were highlighted by the fleece, were unavoidable. They were a little smaller than Jiyoon’s, but that’s only because she’s on the larger side; I’m quite confident in this area myself. With this… maybe… maternal instinct? Anyway, somehow or other….
"……."
"What are you doing. Again."
"I, um…. Look…."
"Did you spill coffee on your clothes?"
"Geez…. You can see it if you look…!"
I even straightened my posture for no reason so he could see better, but he asked if I spilled coffee! The frustration was brief, but I fiddled with the tie draped over my chest and straightened my back again. Look, look. Whether it’s an old man, my classmates, or the neighborhood kids, passing men are always busy glancing at my chest. …You’re no different, right?
"……."
"……."
Fortunately, did he notice this time? As I fiddled with the end of my drooping uniform tie and tapped the buttons pulled tight across my chest, Seo Woojin’s gaze finally turned this way. My face. My chest. And, my face. Slowly, up and down, as if he found it a bit absurd. Ten seconds, thirty seconds. Only the white noise of the cafe filled my ears, and just as I was about to raise the white flag and pick up my coat, unable to bear the embarrassment, he stood up.
"……. …."
"O, oh?"
Seo Woojin’s voice whispered as he leaned in slightly. Beyond that, the voice of the female part-timer smiling brightly, telling us to leave the trash and that customers don't have to clean up themselves, drifted in faintly. …While I was frozen, stuttering, Woojin chuckled and pulled me along gently. Because of that, I ended up toddling along behind him, but I had no room to care about whether that was "sister-like" or not.
"……? …?"
Suddenly going home…? Doesn't that mean the date is over just like this—
*****
-…*Slurp*…. *Mmph*….
My sister’s room. On my sister’s bed. …Instead of the place where I had been masturbating so hard, I was in my own room where I had been having tons of sex with Seo Woojin behind my sister’s back, turning off the phone microphone and cranking the volume to 100.
-*Phew*…. *Ugh*…….
Is there any need to figure out the source of the squelching sound? Seo Woojin suddenly called me, and while there was no "Hello" from the other side, I heard whispering, and then, like this. The squelching sound started. It’s pretty obvious what it is.
…The sound of kissing. The sound of my sister and her boyfriend kissing. So, it’s a very obvious sound.
-…*Ah*…. Hey, that tickles…!
-…….
-Why are you using your mouth there…. *Ugh*…. If a mark, is left….
-…….
Listening to that obvious sound, I plunged my slightly curled index and middle fingers into my hole. …Doing this reaches a very pleasant spot. It’s a pathetic sensation compared to when I have sex with Seo Woojin, but still. It’s better than nothing.
-Stop kissing my neck for now…. Now, again….
-…….
-…Do it quickly. …Kiss….
-…….
-You’re even drinking all your saliva, sister…. *Mmph*….
Seo Woojin probably called to check if I was doing well as I was taught. It’s obvious what that idiot was thinking when he called. …But what do I do? I couldn't hear any of it because I was masturbating. Since it’s come to this, maybe a video call would have been….
…*Puh-heh-heh*. Just kidding. Just kidding. This has its own flavor, too. What position is my sister being taken in right now? …Ah, I’ve already had that cock shoved into me in that position. The joy of imagining that. My sister is probably… lying on the bed, or sitting, and kissing Seo Woojin, right?
But what a shame.
"……. *Ung-geuk, ugh*………."
I’ve done that way more than my sister has….
My sister is one step behind. I’m sorry. …No. Actually, I’m not really sorry. Hmm…. Ah, right. Thank you? Sister. Thanks for the meal.