Don't Break Your Promise… Or I Might Really Get Mad
"Ghk! Koff!"
Cum gushed fiercely from the glans that had forced its way down my throat. Almost at the same moment, a loud bang on the door shook the entire house. Areum's body, which had been jerking her hips, flinched hard. I startled too, and cum spilled from the corner of my mouth.
"Haa…"
"Gulp, huff… M-move."
"…Didn't I tell you not to spill any?"
Whatever was happening outside, it was definitely Sarang. The thought that this was no time to be doing this hit me first.
"I get it, so—ghk! Check outside first, mmph!"
The hair Sarang had carefully tied back for me was seized in Areum's fist. She used my head like a handle and shook it. Of course, her cock was still buried deep in my mouth.
"Why the hell… hngh… are you… haa… worrying about Shin Sarang?"
"That's not—huff! Ugh, haah! Ghk!"
Her hips sped up until the glans was slamming in and out of my throat too fast to count. Nausea surged up.
"Tighter. Tighter, tighterrr!!"
Tears pricked at the corners of my eyes. I wanted nothing more than to clamp down and bite the damn thing clean off, but the aftermath terrified me too much to try.
"Stooop…! Hnngh! Kuh! Ghk!"
In the end another orgasm hit, and cum slid down my throat straight into my stomach. Areum milked her cock with long strokes, pouring every last drop into my mouth.
"You… once your period's over, you'd better be ready. I'm using every last condom we've got left on you."
"Hngh…!"
Muttering that, she roughly groped my breasts. It wasn't caressing—just pure torment—and I clenched my teeth hard to keep from moaning.
"Hey, why are you zoning out? You've still got to clean it properly."
"Hngh, hah… huff… slurp, mmph… sluuurp…"
"Every corner, nice and clean… hnn… with real care… huff, haa…"
Normally I would have talked back until she hit me. Even if I always lost to her fists, I still would have talked back. But worry about Sarang came first… so I just did as I was told and sucked her cock without a word. I licked and swallowed the thing coated in cum and spit exactly the way that bitch Areum ordered—thoroughly, carefully.
"Heh, you're doing great… haaa…"
She stretched out on the bed like it was the most natural thing in the world. That left me on all fours like a dog, palms on the floor. My heavy breasts hung down, and the pose with my ass stuck out was pure lewdness. Areum's fingers twisted and played with my nipples. Satisfaction was written all over her face.
"Hngh… I-I'm done…"
"Didn't I tell you not to spill any earlier?"
"Y-yeah."
Her fingers swept across my face. The cum that had dribbled out earlier was gathered up and pushed back into my mouth.
"Can't waste it."
"Slurp-slurp, mmph, mm…"
"…You're getting the hang of it on your own now?"
I tugged the panties and pants that had been half-draped over her thighs back up. My ass lifted with the motion; I grunted a few times and finished the job.
"Is Shin Sarang really that important to you?"
Her fingers scraped over my tongue, stroked my cheek, then jabbed toward my throat.
"Slurp, mmph, sluuurp…"
"Not answering?"
"Mmph… N-no… it's not like thaaat…"
"……"
Areum stared straight at my face. Ever since Sarang had moved into this house, she seemed locked in that same shitty delusion.
"…Really?"
"Y-yeah…"
"Haa…"
A heavy sigh brushed my face. Then the hand left my mouth, and both of her thick arms wrapped around my back.
Thud—
Her body covered mine completely, hands and feet pinning me down.
"Huff!"
I was squeezed tight by arms and hands. The crushed breasts made it hard to breathe.
"Night…"
"Hngh, h-hey…"
With that one-sided goodnight from Areum, even breathing filled the room.
The bitterness of cum and the crushing weight on my chest filled everything. Areum seemed already asleep, but I still couldn't escape her hold. The slightest movement and her hands and legs snared me like a spiderweb and refused to let go.
"Hnn…"
I spent a long time staring into the dark before the strength finally left her body. The hands that had bound me loosened, and the leg draped over me slid away.
First thing I wanted was to rinse my mouth. There was a limit to how long I could hold my breath, and the constant smell of cum rising from my throat made my teeth chatter.
Afraid of waking her, I slipped carefully off the bed and walked quietly but quickly out to the living room. I went to the kitchen, filled a cup with water, and rinsed my mouth over and over. The taste of cum didn't vanish completely, but it was a lot better.
Next was Sarang.
The one who had pounded on the door hard enough to break it earlier was definitely her. …She had to have misunderstood. Just thinking about it made my head hurt.
After some fretting I went to Sarang's room—the one right next door to where I had been lying until a moment ago.
Knock-knock—
It was definitely late. She might already be asleep, yet somehow I felt sure she was awake. No answer came, so I quietly opened the door and stepped inside.
Creeeak—
The eerie creak of the door and the gloom of a room darkened by closed curtains fit together perfectly.
"…Asleep?"
The shape of a person leaning against the wall, cutting through the dark, only added to the chill.
"……Yes."
"Then who just answered?"
"……"
This time there was no reply.
"Can I come in for a bit?"
"……Yes."
She sounded sulky. It reminded me of the way Areum used to pout when she lost a strength contest to me as kids.
I started to say something, then decided to wait a little. An angry person was like a bomb that would explode at the lightest touch. So I stood still, ready to wait as long as it took until Sarang showed any sign of calming down.
She neither called for me first nor made any move. She just sat leaning against the wall, watching me. That was all. The suffocating silence stretched on. Tension made my legs start to go numb. I wanted nothing more than to sit on the floor right then.
"Hmm…"
That pointless staring contest dragged on a little longer until I finally couldn't stand it and opened my mouth first.
"About earlier—"
"Why did you do that!"
Sarang's fierce voice cut me off cold.
"Y-you two… aren't supposed to do that…"
"…So that was a misunderstanding—"
"A misunderstanding!? What kind of misunderstanding? Haa… I'm sorry for suddenly yelling… I'm just so frustrated right now…"
She drew in a deep breath and let it out. Even breathing looked hard for her. And just as I had feared, it had become reality. She had thoroughly misunderstood what was going on between me and Areum.
A tangled ball of thread filled my head. I had to untangle it. With that thought I tried speaking again.
"Sarang…"
But my mind was still a mess. Should I lie to her? And even if I tried, could I actually pull it off…? Or should I explain the whole situation properly? But even if I explained, would she even accept it…?
That our bodies had swapped, and that it was all my fault. That the Areum currently in my body was grinding her teeth and taking revenge on me… Would she believe this ridiculous situation that belonged only in novels or movies? We might just end up looking like a crazy bitch and a crazy bastard. And if word ever reached our parents, it would blow up into something far worse.
"Ah… b-but… it's okay… I… I can still understand…"
"…Huh?"
Sarang suddenly muttered that and stood up. Then she slowly walked toward me. It was too dark to make out her expression clearly. But her body was trembling.
(Shin Sarang)
I thought that since we were siblings, it was natural to feel affection for each other. And because it was a special situation where bodies got swapped, I thought it could be even more so.
"I… can understand…"
"Huh…?"
I took a big step closer. Forcing my trembling body to stay still, I approached him slowly.
"I said I can understand…"
"W-what?"
"E-everything…"
I wrapped my arms around Oppa. Even though we were about the same height, I rose onto my tiptoes and hugged him tight against me. Then I whispered my true feelings right into his ear.
"But you can't do it anymore. It was never supposed to happen in the first place, so this is as far as it goes. Okay…?"
"Ah, uh, yeah."
"Really!? Then promise me."
I hadn't expected it. I never thought Oppa's answer would come out so quickly, without any hesitation. So I was so happy I could have jumped. Before he could take the words back, I let go of the hug and held out my hand.
"Hurry!"
"A-alright."
Looking a little dazed, Oppa offered his pinky. I linked mine with his, and our thumbs pressed together to seal the stamp.
"You mustn't break your promise… Or I might really get mad, you know."
"Y-yeah. Of course."
Oppa answered like that, nodded at me, and gave a small smile. I smiled back at him.
We made a promise, so he won't do it again… So I believe in Oppa.
