Chapter 19
With both hands sticky with my semen, Chaerin tried to rise from the mattress.
She was probably going to the bathroom to wash the semen off.
But I wanted to finger Chaerin, so I grabbed her wrist before she could stand and pressed her back down.
“Wait a minute.”
“Why?”
“We’re not finished yet.”
“What isn’t?”
Chaerin glanced down at my cock with a look that seemed to ask whether I wanted her to give me sexual relief again.
“Come to think of it, it wouldn’t be fair if I were the only one receiving sexual relief.”
I said, meeting Chaerin’s eyes.
“This time, I’ll take care of you.”
As soon as I finished speaking, I cupped Chaerin’s face in both hands and kissed her.
This was the first kiss between me and my younger twin sister.
“Mmph…!?”
Chaerin’s eyes flew open in disbelief.
I could feel her soft, plump lips stiffen in surprise.
As though she had even forgotten how to breathe, Chaerin gave herself over to me like a doll.
Her flustered eyes trembled.
It would have been a thrilling scene straight out of a romance movie if not for the fact that her hands were covered in semen.
Chaerin tried to say something, but whenever she did, my lips covered hers.
“Mmph, slurp, hey, wait, mnh, smooch….”
I wasn’t skilled at kissing, either.
But the sensation of the passionate kiss I’d shared with Iseol noona, my homeroom teacher, earlier today was still vivid on my tongue.
Recalling that memory, I gently brushed my tongue along the gap between Chaerin’s tightly closed lips.
When I licked upward, lightly tickling them, I felt the tension leave Chaerin’s shoulders.
A tiny gap appeared between Chaerin’s lips.
I didn’t miss the opportunity and slipped my tongue inside.
“Mmph, smooch, this is my first kiss, mmm, slurp….”
While our tongues mingled, the inside of Chaerin’s mouth, where she shyly confessed it was her first kiss, tasted sweetly of strawberries.
When I cautiously swept my tongue over the tender flesh inside, Chaerin twisted at the waist.
Her body seemed not to know what to do with the foreign sensation she was feeling for the first time.
But she didn’t seem to dislike my tongue, since she never pushed me away.
So I found Chaerin’s small tongue and wrapped mine around it.
Perhaps she found the contact awkward; her tongue kept wriggling, but I didn’t let it slip away and entwined it with mine.
My hand had already found its way back to her breasts.
There probably wasn’t a man alive who wouldn’t be aroused by Chaerin’s F-cup breasts.
When I tightened my fingers, the soft flesh was kneaded at my whim, just as before.
“Mmm….”
A faint moan escaped from Chaerin’s throat while her lips were sealed.
She seemed unable to think straight from the double stimulation of kissing and having her breasts fondled.
With a satisfied smile, I slowly lowered my right hand from the breast I had been kneading.
I passed her smooth waist and stroked the narrow line of her hips.
The farther my hand descended, the more erotic the way Chaerin rubbed her thighs together became.
When my hand finally slipped inside her pants and panties, that aroused body jolted once more.
I ignored it and pushed my hand in deeper.
The warm heat inside her panties reached my palm.
“Smooch, huff, mmph, there…!”
It was incredible.
Her panties were already soaked through, far beyond merely damp.
Her sticky love juices coated my fingers.
And beneath that, I felt the neatly trimmed short hair.
Naturally, I didn’t hesitate to slide a finger into her pussy.
As I carefully pushed my finger inside, hot, soft flesh enveloped it.
It was tight.
What’s more, the inside writhed like a living creature and squeezed around my finger.
With a pussy this tight, I’d come in less than three minutes.
-Squelch!
The sound was louder than I’d expected.
It was a wet, lewd sound—the sloppy noise of a finger thrusting into a narrow, damp place.
With only the two of us in the room, the sound seemed unusually loud.
I felt precum surge from my cock as well.
Chaerin hurriedly pulled her lips away from mine and said between gasps.
“D-don’t… Sihyeok….”
Contrary to her words, everything about her made it obvious that she wanted me to continue.
Her aroused voice was so sweet that merely hearing it made me want to kiss her, and her face was bright red, as if heated from within.
Her eyes, meanwhile, were filled with anticipation.
Grinning, I stole another kiss from her lips.
This time, it was a much deeper, more passionate kiss.
As my tongue explored Chaerin’s mouth, the finger of my lower hand began moving inside her pussy as well.
At first, not knowing what would work best, I merely inserted my finger shallowly and flexed it.
But I gradually changed my movements in response to the way Chaerin’s body jerked.
The finger that had initially probed aimlessly began moving as though rubbing the vaginal wall with its fingerprint ridges.
“Hmph… mmm…!”
-Squish, squish, squish.
The wet sounds didn’t stop.
I wanted to find the most sensitive part of her.
So I curled my finger and slowly scraped it upward along the inner wall.
Even then, I didn’t stop kissing her; I kept steadily meeting her eyes and moving my tongue.
With her hands covered in semen, Chaerin couldn’t grab me or clutch the mattress; she could only tremble through her thighs.
It wasn’t long after I began probing here and there for the weak point of Chaerin’s pussy that I got a reaction.
“Mmph, there… that’s…!”
I found it. So this was her weak spot.
I pressed down firmly with my fingertip so I wouldn’t forget the spot.
Chaerin’s breathing grew even rougher.
I gently rubbed around it in circles.
But something was strange.
This time, when I withdrew my finger and gently rubbed the lower wall, Chaerin twisted her body even more.
“Ah, ah…! That spot feels strange too…”
What? Were there two sensitive spots? Curious, I rubbed another place.
This time, it was the left side.
“Eek! W-wait, when you do that…!”
Chaerin’s body began trembling as if it were beyond her control.
It wasn’t that any particular spot was especially sensitive. Her entire pussy was simply a mass of erogenous zones.
Chaerin reacted sensitively wherever my finger touched.
As her climax approached, Chaerin’s legs closed.
Her legs tightened around my finger and began to tremble.
I didn’t stop. Instead, I moved my finger faster and deeper.
Overwhelmed by the intense orgasm, Chaerin’s hips instinctively pulled back slightly. Of course, that didn’t let her escape my finger.
Wanting to kiss me more, Chaerin pushed her face toward me with her eyes squeezed shut. She was so cute that I worked even harder to pleasure her pussy.
“Ah, ngh! Haaang…! I-I’m coming…!”
A moan of climax burst through her lips as we kissed.
Chaerin’s body seemed to stiffen, then began convulsing violently.
The force of her vaginal walls squeezing my finger grew tremendously.
-Pssht, fwoosh!
At the same time, hot fluids gushed out like a fountain, soaking my hand and thighs.
Her efforts not to get semen on the mattress became meaningless as the mattress was drenched in her fluids.
Even as she climaxed, Chaerin didn’t pull her lips away from mine.
Did she like kissing me that much?
I waited until Chaerin’s body had calmed down, then slowly broke the kiss.
Chaerin looked at me with moist eyes, panting heavily.
People sometimes compared a woman’s orgasm to a wave, and Chaerin still looked as though she hadn’t made it back out of the wave.
Even after ejaculating twice today and receiving sexual relief just now, my cock was still throbbing hard.
Only much later did Chaerin come to her senses. Seeing her pants and the mattress soaked with her fluids, along with her semen-stained hands, she lowered her head.
Apparently terribly embarrassed, she sprang up from the bed without a word and ran to the bathroom.
“Hoo….”
Left alone in the room, I let out a satisfied sigh.
Judging by that reaction, it seemed I could have sex with Chaerin whenever I wanted.
Even if I pressed her to have sex tonight, she probably wouldn’t refuse. She’d likely pretend to dislike it, snapping at me as she spread her legs.
I’d already had sex with my homeroom teacher, and there was no reason I couldn’t have sex with my younger twin sister. Chaerin seemed to like me, too.
Chaerin, Subin, the vice class president Cha Ayoung, and the countless other classmates who showed me blatant interest.
Couldn’t I bed every one of them if I put my mind to it?
Just thinking about it made my lower body feel heavy. This world was surely a paradise for a man with a sex drive like mine.
I stood up, still lost in those pleasant fantasies.
While I looked around the room, wondering what to do while Chaerin showered, an old bookshelf in the corner caught my eye.
An album and a fairly thick diary on the bottom shelf drew my attention.
Come to think of it, I knew almost nothing about the past of this body, Kim Sihyeok.
How had my parents died? What had my childhood been like?
I’d heard a rough account from Chaerin, but I wanted to confirm it with my own eyes.
When I pulled out the album and diary, they were spotless, without a trace of dust.
Perhaps the original owner of this body had pulled them out to look through them after the accident, missing Chaerin.
Thinking that Chaerin had looked through them because her twin brother had been in a traffic accident made me feel sorry for her.
I took the album and diary and was about to sit in a dining chair.
That was when it happened.
Plop.
A thin sheet of paper fell from between the pages of the diary in my left hand onto the floor.
What was this?
As I bent down absentmindedly to pick it up, I found myself reading the sharply scrawled words across it.
[It isn’t amnesia or anything. I have to remember. I-]