Using one to control another
Using one to control another
I sat on the sofa, staring blankly at the TV.
My mind was so full of what had just happened that I couldn't focus on anything.
Just then, I heard footsteps from the hallway.
Seo-ah Kang was coming out of her room and heading toward the kitchen.
She seemed intent on walking right past me without even glancing my way, as usual.
But after a few steps, she hesitated, stiffened her expression as if she'd made up her mind, and turned back.
"...What? Is something wrong?"
Her voice was blunt and cold.
But it was clear that, unlike usual, she had made an effort to speak to me.
I felt a sudden surge of gratitude and opened my mouth.
"About the... ah, no, never mind."
I was about to tell her exactly what happened, but realized that the moment I did, things would spiral out of control, so I hurriedly glossed over it.
Seo-ah Kang's eyebrows twitched slightly.
After hearing my answer, her expression hardened again.
"...I'm telling you to mind your own business."
She tossed that one line at me and walked back to the kitchen.
Her back looked a bit stiffer than before.
"No, that's not it..."
She must have gathered the courage to talk to me, and I felt sorry that I had no choice but to brush her off like that.
Watching Seo-ah Kang walk to the kitchen without listening to my follow-up explanation, I swallowed a sigh while sitting on the sofa.
'I should have thought before I spoke.'
Soon after, I heard the sound of Seo-ah Kang pouring water from the water purifier in the kitchen.
She drank a glass of water, glanced at me once, and went back into her room.
Once the sound of the door closing echoed, the living room became quiet again.
"...Sigh."
My mind was so cluttered that I couldn't possibly stay in the house any longer.
Eventually, I got up, changed my clothes, and left the house without a word.
I started walking slowly along the trail in a nearby park.
Even getting some fresh air didn't help me clear my thoughts at all.
If anything, all I could think about were the situations that seemed to be unfolding in such strange ways lately.
Me seeing Seo-ah Kang naked, me getting an erection because of Yu-na Kang.
They were supposed to be people I shouldn't feel anything about, yet I couldn't find the reason why my body kept reacting differently from my mind.
Walking aimlessly like that, two hours had already passed, and feeling hungry, I grabbed a quick cup of ramen at a nearby convenience store before heading home.
Click—!
As I opened the front door and stepped inside, Seo-ah Kang happened to be coming out of my room.
...My room?

"Uh... what are you doing?"
I asked Seo-ah Kang, who had frozen as if she'd encountered a wild beast upon seeing me.
It was just a question out of curiosity.
I was tired from the walk, so I didn't think much of it.
But as soon as Seo-ah Kang made eye contact with me, her face started to turn bright red.
Her eyes wavered with obvious panic, and she stuttered.
"U-uh... t-that...!"
Seo-ah stammered for a while, then suddenly raised her voice.
"I told you to open the window and air it out! It smells! Your room smells absolutely disgusting, Oppa! Don't come in! And don't stare at me like a pervert!"
She spat out the words rapidly and ran into her room as if fleeing.
The sound of the door slamming shut echoed through the hallway.
"...What the?"
I stood there blankly for a moment, completely baffled by the situation.
Did she really air it out because it smelled? Was I in the wrong?
I couldn't reach a conclusion, so I went into my room first.
"...?"
The window... was closed.
It hadn't been aired out at all.
Just the blanket was slightly ruffled, and the pillow was a bit crooked.
Everything else was almost the same as usual.
'Wasn't she here to air it out? Why is the window closed?'
I sat on the bed and touched the blanket.
It felt like there was a very faint trace of Seo-ah Kang's scent... or maybe not.
Besides, there was no reason for Seo-ah Kang, who claims to hate my smell, to go out of her way to visit my bed.
'Could she have needed some pocket money?'
I don't use cash, so there wouldn't have been anything for her to take from my room.
I want to believe that wasn't her intention, but...
Somehow, after going for a walk, my head feels even more complicated.
Just then.
Knock, knock—!
I heard a knocking sound on the door.
'Who is it? ...It must be Yu-na Kang.'
Ji-eun Kang would be at work, and it couldn't be Seo-ah Kang, so the only remaining candidate was Yu-na Kang.
"Oh, come in!"
Click—
As soon as I answered, the door opened and Yu-na Kang poked her head in.
She spoke in a bright voice, as if she were intentionally raising the tension.
"Hey, Si-woo Kang! Eonni says she's working overtime today. Want to have chicken and beer, just the two of us? Should we order delivery?"
I didn't usually like beer, but I was grateful that Yu-na Kang had reached out to me after what happened just a few hours ago, so I had no reason to refuse.
"...Sure. I'll buy the chicken."
"Oh! Nice!"
Yu-na Kang beamed and snapped her fingers.
She closed the door and shouted, "Let's eat around 6!" as she left.
I felt sticky from the walk in the early summer weather, so I took a shower.
After finishing my assignment, it was already close to 6 o'clock.
I opened the delivery app and ordered half-seasoned, half-fried chicken from the place we usually order from.
About 30 minutes later, the doorbell rang, and I brought the delivery to the table in the living room.
Hearing the doorbell, Yu-na Kang was already out in the living room, having prepared beer cans on the table in front of the sofa.

"Can't you hurry up!"
Yu-na Kang sat on one side of the sofa and tapped the seat next to her.
She seemed to have her usual energy, but I could feel her eyes wavering slightly.
I put the chicken box on the table and sat next to her.
"Where's Seo-ah?"
"She said she doesn't want any."
Yu-na Kang immediately cracked open a can and placed it in my hand.
Pshhh—!
She lifted her can and tapped it lightly against mine.
The sound of the cans clinking echoed in the living room.
"Where did you go earlier? For a walk?"
"...Yeah. My head was a bit cluttered."
We chatted about light topics while tearing into the chicken.
College talk, Yu-na Kang's job-hunting stress, dramas we'd watched recently, etc.
As we drank one can, then two, the conversation paused for a moment.
Yu-na Kang poked me with a playful smile.
"By the way... about that thing earlier."
My shoulder flinched for a moment.
It was bound to happen.

Yu-na Kang patted my shoulder and giggled.
"Since I'm your older sister, I can understand everything, even if my little brother is a pervert, right?"
"..."
"Sigh... our Si-woo, you're twenty-three years old and you get an e-erection against your sister's chest. It's okay. I'll even understand you, Si-woo the sex offender. Because I'm your sister."
Even though she stuttered, she laughed while deliberately pointing at my thigh in an exaggerated manner.
"Ah, stop it...! I told you it was just because it was morning!"
I recoiled in disgust, but.
"Why? Are you embarrassed? You're cute, though~"
Yu-na Kang giggled and pinched my cheek lightly.
I let out a sigh of relief inwardly and tore into the chicken.
'Still... I'm glad it ended at this level.'
It could have been a situation where Yu-na Kang lost all respect for me.
But the fact that she was teasing me like this—
I knew I'd be teased as a "sex offender" for a while, but I felt relieved that at least our family relationship wouldn't be ruined.
Just then, Yu-na Kang suddenly started pretending to look for the remote.
"Where did the remote go~?"
Seeing her speak in an intentionally exaggerated tone, it was clear she was definitely planning another prank.
Sure enough, Yu-na Kang bent her body toward the end of the sofa.
She leaned over in a cat-like pose, sticking her butt out toward me.

Her thin pajamas pulled taut along her waist, clearly revealing the line of her voluptuous buttocks.
'...This woman.'
I realized her intention.
Yu-na Kang was trying to provoke me into getting an erection again to tease me further for being a "sex offender."
'Until the East Sea's water runs dry and Mt. Baekdu wears away—'
Fortunately, I was able to divert my gaze within a second, so I could handle it.
To avoid falling for her trick, I started reciting the national anthem in my head, which was highly effective.
While pretending to be unfazed on the outside and quietly tearing into the chicken—
Yu-na Kang muttered, "Tsk, no fun," and started pushing her butt closer to me.
And in that position, she started tapping my shoulder with her butt.
"...?!"
I immediately started reciting the second verse of the national anthem, but...
It was minimally effective.
The sensation of the soft, warm, and above all, lewd part of her body being transmitted through my shoulder was too vivid.
Above all... on the buttocks that kept entering my field of vision, for some reason, no matter how much I looked, I couldn't see the outline of her panties, which made it even more lethal.
'If it stays like this, I'm done for.'
Perhaps because of the alcohol, a thought that I would never have had otherwise crossed my mind.
Counter-fire strategy.
I-i-je-i.
The saying that you fight fire with fire, and barbarians with barbarians.
I suddenly stood up and pressed myself closely behind Yu-na Kang.
And I pressed my crotch directly against the buttocks she was sticking out.
"The remote... I think it's over there? Right in front."

I said it nonchalantly in an acting tone, and deliberately pushed my waist slightly forward.
My penis, which had started to harden, was pressed as if buried between her soft buttocks.
In an instant, Yu-na Kang's body stiffened.
"...!!"
Her breathing stopped.
I lowered my gaze at the suddenly silent atmosphere.
Looking down at her face, her ears and the back of her neck were dyed bright red.
The playful look she usually had was nowhere to be found, and a pitiful expression, biting her lips slightly, had taken its place.
'Ah, I'm f*cked—'
I came to my senses in an instant.
I quickly stepped back and covered my almost-erect crotch with a sofa cushion.
"...Sorry."
Yu-na Kang couldn't say anything for a long while, then suddenly jumped up, covered her face, and ran away to her room.
"...You pervert...!!"
The sound of the door slamming shut echoed.
I slumped onto the sofa and let out a long sigh.
"I'm an idiot."