Chapter 52: Birthday (6)
Chapter 52: Birthday (6)
I thought I knew Kang Yu-min well.
After all, we had spent a long time together like close friends, and being born only a year apart, we weren't exactly distant.
We were closer to being bad friends, but I thought I knew everything there was to know about her. I could predict how she would react in certain situations and how she would behave.
Naturally, my attention was fixed on her.
I easily deduced what her reaction would be.
She would definitely scream. She would demand to know what the hell I was doing and interrogate us about what siblings were doing together.
Even if she knew she and I were in that kind of relationship, she would still start by questioning me.
At least, that’s what I thought.
“…What are you doing?”
I turned my head blankly at the sound of a voice that was completely different from my expectations.
The Kang Yu-min I saw then felt somewhat like a stranger.
Her expression, her actions, even her words.
Everything felt like she wasn't the Kang Yu-min I knew. It was only natural that my mouth hung open as I stared at her.
Yu-min stood tall, looking at Yuri and me with an expressionless face. Goosebumps ran down my spine, and a chill made my body tremble slightly.
Inside Yuri, my member was slowly shrinking, and as it was held by her tight entrance, it smeared a mess of semen all over the opening.
But before I could feel any arousal from that, I felt a sense of dissonance.
It was a dissonance coming from the reaction of Yuri, who was pinned beneath my body.
As I quietly observed the situation, Yuri moved out from under me. I stood up, pushed by her wriggling movements, and Yuri sat on the sofa with a faint moan.
Naturally, the overflowing semen soaked the sofa. She frowned slightly, perhaps due to her aching thighs and groin.
But the two of them locked eyes as if they didn't care.
“Kang Yu-jin.”
Suddenly, Yu-min’s eyes rolled toward me. Her voice was uncharacteristically cold. It wasn't the vulgar yet lovely moans she made when we slept together lately, nor was it the soft voice she had after the act.
It was a cold voice, devoid of any emotion. I watched Yu-min while sitting awkwardly, and she stared at me before gesturing with her chin.
“Go wash up.”
“…No, I mean.”
“I told you to go wash up. You’ll catch a cold.”
I felt like her very aura had changed. I swallowed hard instinctively and stood up. Feeling her gaze following me, I headed into the bathroom to shower.
Before turning on the water inside the familiar shower booth, I strained my ears.
No voices could be heard. Were they just staying there in silence without even talking?
Just imagining it was chilling. It reminded me of a long time ago, back in middle school.
I suddenly remembered the girls who used to have psychological wars in front of me. I hadn't known why they were doing it or what I was supposed to do.
It was the same now.
No, was it a little different? Unlike back then, I could at least guess the reason now.
I had sex with Yuri even after having sex with Yu-min. I had even been caught right in the middle of it.
I didn't know exactly what she was feeling, but I knew that whatever emotions Yu-min harbored wouldn't be pleasant.
Ominous thoughts even crossed my mind. I finished my shower quickly, put on the clothes Yu-min had brought for me at some point, and stepped out.
“See you later, Oppa.”
Yuri passed me with a seductive smile and disappeared into the bathroom. I was then faced with Yu-min, who was cleaning up the spot where my sister had just been.
My second sister and bad friend, wiping the sofa with wet wipes, deodorizer, and paper towels, cleaning up the sweat and semen spilled on the floor.
And, as far as I knew, my family member who was also my sex partner.
The part about a family member being a sex partner was incredibly strange, but I couldn't help the reality of it. I approached her cautiously and pulled out a wet wipe, trying to help her clean.
“Just sit down. You’re in the way.”
At Yu-min’s cold words, I had no choice but to shut my mouth and sit back down.
The sofa where my sister and I had been entwined for hours gave off the faint, distinct smell of semen.
Since she had sprayed deodorizer, the smell would vanish once we opened a window to ventilate later.
But for now, the evidence was glaring. It seemed she intended to ventilate once Yuri came out.
I watched Yu-min warily. She repeatedly wiped and sprayed deodorizer before suddenly looking at me.
She didn't say a word. In her black eyes, directed at me with an expressionless face, countless emotions seemed to be swirling.
They were too tangled for me to pick apart one by one, but her eyes held a stickiness that couldn't be ignored.
It was a gaze that seemed to reproach me yet not blame me, and seemed not to hate me yet seemed fed up.
It was only natural for me to lose my nerve and hunch my shoulders, and seeing my reaction, Yu-min’s eyes trembled slightly.
Sigh. The sigh that escaped her felt painful. I quietly lowered my eyes, and soon Yuri came out, humming a tune after finishing her shower.
“Ah, Unnie cleaned it up. Thanks.”
Yuri spoke with a beaming smile, and Yu-min watched her. A suffocating tension filled the air.
Yuri was the start of it. She was acting as if she were oblivious, as if she didn't understand the situation, but she seemed to know exactly what she was doing and how she was being perceived.
And yet, she didn't care. She had always been strong-willed and outspoken, but…
That trait was exceptionally prominent this time.
Even I was gulping nervously, and Yu-min’s response showed none of her usual loser-like behavior.
“Sit down.”
Yu-min commanded in a voice thick with authority, as if proving her history as a former captain of the girls' soccer team. Without a trace of her usual dorky self, she crossed her legs.
I sat in the middle, Yuri sat next to me, and Yu-min sat facing the two of us.
Sitting like that, it was hard to even breathe comfortably.
It was suffocating. We were family, the people I should feel most comfortable with, but for some reason, my middle school and high school years overlapped in my mind, making me feel like I was being strangled.
Why? Well, I knew the reason.
I struggled between the irrational and the rational. Meanwhile, Yu-min—my second sister and sex partner—and Yuri—my younger sister who had just completed her coming-of-age ceremony with me—stared at each other.
Just as I was thinking that the atmosphere might improve if someone just said something.
“What do you think you’re doing?”
Yu-min spoke. The chill embedded in her voice gave me goosebumps.
I take it back. It was better when they were just glaring at each other in silence.
“Hmm? What do you mean?”
“I’m asking what you two were doing.”
“Isn't it obvious?”
“It is. So, what were you doing?”
“I don’t know. I’d like it if you could be a bit more specific.”
“…Do I really have to say it out loud?”
Yu-min frowned slightly. It was a strangely captivating expression, but as I tried not to show it, her eyes flicked toward me. A glaring gaze.
As expected, I had to admit it wasn't bad.
“You tell me. What were you doing?”
“…Well.”
“Are you in your right mind?”
Hey, I hadn't even said anything yet. When I looked at her, feeling a bit wronged, Yu-min’s expression softened. Perhaps she felt bad for cutting me off.
But it wasn't enough to make her stop entirely, as Yu-min’s long index finger pointed at me.
“There are things you should do and things you shouldn't. How could you with your younger sister…?”
That was when Yuri let out a laugh. Her suppressed giggles were laced with clear mockery.
Naturally, the corners of Yu-min’s eyes twitched, and a vivid annoyance appeared on her cold face beneath her short hair.
“Hey, Kang Yuri…!”
“You do it too, Unnie.”
Yu-min’s mouth snapped shut. Her eyes widened and turned toward me. Her look seemed to ask if I had told her.
Before I could even shake my head, Yuri clung to my side.
“Don’t blame Oppa. You did it because you liked it, too.”
“That’s not it…”
“You didn't even clean up properly afterward.”
The grin on Yuri’s face was somewhat chilling.
“…What are you talking about…?”
Yu-min tried to play it off naturally, and I started to stammer, but both Yu-min and I were forced to stop when we saw what Yuri pulled out.
“Didn't you think it was fine to get caught? Just like me.”
With that same soft smile, she swung what she had pulled out from side to side. The object moving like a pendulum was something familiar.
The specific memory of its shape had long since faded, but I logically knew where it had come from.
In Yuri’s hand was a condom.
“How…?”
A condom bulging with semen. Though the inside had turned slightly yellowish, both Yu-min and I knew exactly what it was.
We couldn't even think that it was a fake or belonged to someone else.
The shape, the texture, the color, and even the amount were all startlingly familiar.
It was the condom used on the cruise, the one that was never supposed to be seen again.
It was the trace of the semen I had poured into Yu-min’s uterus.
While Yu-min and I were both frozen, Yuri swung the condom with a provocative smile, as if showing it off. Our eyes followed the object as it swung left and right like a pendulum.
Until finally, it dropped onto the floor with a thud.
Yu-min’s eyes slowly rose to meet Yuri’s, and my eyes fixed on the condom filled with semen.
With the realization that perhaps Yuri had wanted things to turn out this way from the very beginning.
Yuri wrapped her arm around mine and whispered softly.
“Unnie, you asked what we were doing, right?”
As Yu-min’s eyes trembled faintly, Yuri spoke with a vivid smile.
“I seduced Oppa first, asked him to get me pregnant, and we had lots of sex while I whispered that to him.”
“…You.”
Cutting Yu-min off, Yuri gave a lovely smile.
“Because I love Oppa.”
And then, a silence that seemed to freeze time itself filled the room.