Chaerin, Want to Have Sex?
A tightness that had never permitted anyone's entry.
The virgin pussy of my innocent childhood friend, the girl who had been secretly in love with me for so long.
Subin gasped faintly at the foreign sensation and the faint sting of pain, yet her face shone with a happiness far greater than any discomfort. The ecstasy of becoming one with the man she loved.
For her sake I began to move my hips with the utmost care and slowness.
Squish… schlick…
The wet sound of my cock gently parting her vaginal walls, already slick with her juices, filled the room. They said HSDD meant almost no sexual desire, yet once we were actually having sex her wetness was hardly any less than other women's. The power of love really was something else.
A warm air filled the room, free of awkwardness even without words. Just looking into each other's eyes made our hearts pound as if they might burst. Love dripped so clearly from Subin's emerald eyes that you could almost see it fall.
"You okay? Does it hurt a lot?"
"No… I'm fine… It feels good…."
Whether she meant my cock or me, I couldn't tell. Probably both.
Every time I rolled my hips she let out a tiny moan. She looked so precious that I gently licked the sweat beading on her forehead, then kissed her deeply once more. No tongue—just soft, lingering pressure of lips on lips.
When I sucked lightly on her lower lip, a sweet fruity scent rose from her saliva. My hands didn't stay idle either. I cupped one of her large breasts the way I had earlier and massaged the soft fullness that overflowed my palm.
"Hnn… Sihyuk…."
As I kneaded her slowly and lewdly, I felt her hardening nipple roll under my palm. At that sensation her pussy clenched around my cock with a little twitch.
"You like this too?"
I rolled the nipple between my fingers as I asked.
"Yeah… I like it. But the feeling's weird… You're touching my chest, yet my lower belly is… tingling…."
Her honest reaction made me smile. Feeling playful, I pinched the other nipple lightly between thumb and forefinger.
"Hyah…!"
A cute cry burst out of her. Her pussy squeezed my cock hard. The sudden intense stimulation forced me to freeze; her walls spasmed and locked me in place so I couldn't move.
"Hah… I've never felt anything from my chest before."
"Amazing. You're feeling it through your nipples?"
"Maybe because you're the one touching me… Hehe…."
Subin looked up at me with pleasure-glazed eyes and gave a small smile. Satisfied, I began moving my hips again.
The initial tightness had almost completely faded. Now her pussy poured out sticky juices that matched every thrust of my cock.
Slap, squelch, squelch…
I fucked her slowly and carefully for longer than it would have taken other women to climax twice. Gradually I picked up the pace. The fresh, pure atmosphere was replaced by raw sexual heat. Subin no longer tried to hold back her moans; they spilled out more and more freely.
"Ah, ah… Ang! Sihyuk! There, there feels weird…!"
There was a spot that made her thrash especially hard—her G-spot. I pressed the head of my cock against it relentlessly. Subin took the intense pleasure into her slender body and shuddered.
"I-I'm gonna come…! It's my first time feeling like this…! Ugh, hnn…!"
Right then—
Click!
The electronic lock on the front door disengaged. Soft sounds of the door opening and closing followed. Chaerin must have come back from the academy.
The moment Subin realized it, her body jerked and stiffened. The flustered squeeze of her walls around my cock told me everything.
"Ch-Chaerin's here…! Wait, stop…!"
She tried to push me away in panic, but there was almost no strength in her hands. If anything, I could feel her true desire to pull me even deeper. I didn't want to stop either. The situation itself was insanely hot. And stopping halfway through was simply unthinkable.
"It's fine."
I whispered against her ear.
"Just ignore it."
And I kept moving my hips without pause.
Squelch, squelch, squelch!
"W-Wait…! What if she hears us…!"
The knowledge that her friend Chaerin stood just beyond the door only made Subin clamp down harder around me out of embarrassment. I casually brushed aside that cute resistance and drove deep into her pussy, fucking her roughly.
"Hnnph…! Mmph…!"
Subin bit her lip to hold in her moans. The more she held back, the more sensitive her body became. I found her adorable, and at the same time I wanted to see her drop every last scrap of reason and cry out.
My climax began to build. Sensing the change, Subin desperately tried to stop me.
"Sihyuk, you can't come now…! If Chaerin finds out she'll be so sad…!"
"Don't hide it, Subin. Be proud."
I whispered into her ear again.
"You've spent your whole life hiding yourself like that."
Subin had lived concealing the fact that she had HSDD, terrified of being treated as a freak by her friends.
"In front of me you don't have to hide anything. Cry if you want to cry. Scream if you want to scream. Show me everything."
"Ah…!"
It was a weird thing to say in the middle of sex, but I meant every word. It was what I had wanted to tell the girl who had done nothing but endure, endure, and endure some more. Her tragic past and the fragile personality born from it made my protective instincts flare just looking at her.
My sincere words made Subin's eyes tremble hard. At last she glanced once toward the door and then let everything go.
"Ah, hyaaaah…! Sihyuk! I like you! I love you…!"
Overwhelmed by emotion, Subin finally stopped holding back and climaxed with a full-throated cry. Again and again she shouted that she loved me as she came—almost as if she wanted Chaerin outside the door to hear every word.
Her pussy convulsed and squeezed my cock once more. The overwhelming pleasure finally broke me; I poured hot semen deep into her.
Brrrrrr…!
Still panting through her orgasm, Subin murmured at the scorching sensation flooding her insides.
"Haa, haa… so this is… cum…."
She lightly touched her lower belly with a mixture of joy and wonder on her face. Realistically I figured none of it had even reached her womb yet, but I didn't bother saying so out loud.
After her climax Subin reached up, pulled my face down, and kissed me.
"I love you♡"
"Me too."
Thud!
Right then something dropped outside the door. Chaerin must have heard everything, but there was no point worrying about it now. Instead I kissed Subin harder and began pumping my hips with renewed vigor. Her pussy had grown used to my cock; I slid in even smoother and deeper than before.
"Hnnngh…! Chuu, smooch…!"
Subin moaned even louder as she answered my kisses. We devoured each other's mouths and rutted like animals. We stayed in missionary for a long while before switching to cowgirl. Being her first time on top, Subin barely managed a few movements before her strength gave out.
After we had fucked for a very long time and finally opened the bedroom door, the hallway was empty. Chaerin had already gone home.
Outside Subin's room the silicone dildo I had been holding slipped from my fingers and fell uselessly to the floor. I didn't even think about picking it up. Every scrap of my attention was locked on the firmly shut door.
It was Subin's voice. Not the shy voice I knew so well. It was the completely pleasure-soaked, mindless cry of a female in heat. Mixed into that voice was a wet, filthy sound.
Squelch! Squelch!
The sound of a cock thrusting.
My mind went blank. My heart felt like it was plummeting straight into the ground. My fingertips turned ice-cold.
No. It can't be. I must have misheard.
But even when I covered my ears the sounds only rang clearer inside my skull. The two of them were having sex right now, with only a single door between us.
The instant that truth sank in, my breath caught. I staggered backward. Then I spotted the front door and bolted outside like a madwoman. I never looked back.
I don't remember how I got home. Tears blurred everything so badly I could barely see. My heart just hurt so much. It felt like someone was raking sharp shards of glass across it over and over.
The moment I reached the house I collapsed onto the mattress without even turning on the lights. Then I started crying out loud like a little kid.
"Hwaaaa… hhic, kuh…."
I was furious. I was heartbroken. And more than anything else I was terrified.
These days even siblings can marry; the old taboo no longer mattered. Maybe the reason Oppa rejected me wasn't because we were family. Maybe it was simply that I had no charm as a woman. That he just didn't love me. That possibility drove me insane.
Every negative emotion tore through my heart—jealousy toward Subin, hatred for the foolish hopes I had built up all by myself, and the raw terror that Oppa might abandon me completely.
I cried until my tear ducts ran dry. By the time I finished, night had fallen completely outside.

I stared blankly up at the ceiling with swollen eyes. That was when it happened.
Click.
The familiar sound of the front door opening. It was Oppa.
I flinched and hurriedly muffled my sobs, diving under the blanket. I didn't want him to see me like this—weak, ugly, blinded by jealousy.
His footsteps grew closer. Then the mattress dipped slightly as he sat down beside me. I held my breath.
His large hand began to stroke my back gently through the blanket. Warm. Tender.
That touch nearly made the tears I had been holding back burst free again.
After giving me plenty of time, Oppa finally spoke.
"Want me to have sex with you?"
His voice was so incredibly soft. Yet the words stabbed into my chest like a dagger.
This was pity.
He had seen me suffering from jealousy and felt sorry for me, so he was offering his body the way you hand candy to a crying child.
The thought that I had become a burden to him made me hate myself. I felt like nothing more than an annoying little sister who had made a man worry.
I should refuse. Of course I should refuse. I didn't want pity sex.
I had to refuse.
And yet….
"Yeah…."