Deciding to Build a Harem
I was so thrilled to finally have claimed Chaerin that we had sex for quite a long while. She came so many times in the process that I lost count. Her body was already trembling at its limit, her voice completely hoarse. But I showed her no mercy. If anything, I drove into her even deeper and harder, as if testing just how far she could go.
In the end, when Chaerin climaxed yet again, I flooded her with my second load. When the frantic thrusting finally stopped, only our ragged breathing filled the room. The mood was clearly winding down. I pulled out, wiped the sweat beading on her brow, and said,
"Good girl, Chaerin. Your pussy really squeezes so well."
"Hah... really...?"
She smiled weakly at my praise. She was completely spent now; more sex would be impossible. Orgasm demands enormous stamina from a woman. Unless she was someone like Yeji, who worked out every day, this was her limit.
With the most important sex out of the way, I thought we might have a serious talk. The air against my still-excited skin was growing cold, so I picked up the T-shirt that had fallen to the floor and pulled it on.
But then—
"Sihyuk..."
Chaerin called to me. She was straining with everything she had to push her upper body up.
"I can still go. I can do sex better than those girls..."
She pleaded, nuzzling her face against my thigh. It was a cute little act of wanting to taste my cock more.
Watching her, I felt a faint puzzlement. The Chaerin of this moment was clinging to sex itself far too desperately—even though she was on the verge of collapsing from exhaustion. Of course I understood wanting more after losing her virginity, but this level of obsession was excessive.
And that line just now—"I can do it better than those girls"—struck me as odd.
"Better than those girls? Who are they?"
She flinched at my question. After a moment of hesitation she answered in a small voice.
"...Better than Nari or Yuna. And better than Subin too... I want to be better."
"What do you mean by that?"
When I asked again without understanding, Chaerin fumbled through an explanation. Apparently she had always been confident in her sexual processing skills, but after seeing the other girls' abilities at the Academy she had grown anxious. Nari's overwhelming fellatio skills in particular had dealt a serious blow to her pride.
I found that lewd competitiveness adorable and let out a short laugh. She had even overheard Subin and me having sex just a little while ago, so of course she would feel pressured.
While I was thinking that and letting my guard down for a second, Chaerin climbed on top of me. I was still only wearing a T-shirt, so my cock was fully exposed. She lined her pussy up with it and slowly lowered her hips.
Round two began with her riding cowgirl.
—Schlick!
"Hngh...!"
As my cock sank into her she reacted intensely, yet she refused to let herself fall. Instead she leaned her upper body toward me and began rocking her hips gently back and forth.
"Oh... this is nice."
It felt like her tightly clenched entrance was caressing my cock from inside. On top of that, her large breasts were squashing and overlapping against my T-shirt—incredibly hot. She still hadn't learned about positions at the Academy, so her movements were unskilled. But that only made it better. The pure, unpracticed desire in the way she worked her hips.
That purity made my cock fully hard again. With our mucous membranes perfectly meshed, the wet rubbing sounds and the pleasure drew a contented sigh from me.
"Haa... anh...! Sihyuk, does it feel good...?"
"It does. Keep moving."
"Okay, ahh, hah, nngh...!"
Encouraged, Chaerin's movements grew bolder. The hips that had only been rocking front to back now began drawing circles, kneading my cock from every angle. Her breasts bounced heavily in time with the motion. The way she rocked and squeezed looked like pure female greed, hungry for pleasure and cum.
Then, true to her premature-ejaculation pussy, she climaxed first with a flood of moans and collapsed on top of me.
—Pssshhhhh!
"Ugh, ugh, hyaaaah...!"
The powerful orgasm made my cock slip free, and a fountain of juices poured down from her pussy. My cock and the mattress were completely soaked in her climax fluids. From the successive orgasms Chaerin's eyes nearly rolled back, but she barely held on.
"Haa, haa, sorry I came again..."
Before I could say anything she grabbed my cock again and pushed it back into her pussy.
—Schlick!
"Aaaah, nngh...!"
But she had truly hit her limit; her body only twitched and she could barely move her hips.

"Don't force yourself."
I said it gently, but she shook her head.
"No, it's fine... I can do more, more... hngh, huuuh...!"
The way she kept moving just to make me feel good was both pitiful and incredibly arousing. So half out of pity and half out of lust, I gripped Chaerin's ass and thrust up into her from below.
—Thud!
"Hgyaaaah...!"
She screamed at the sudden stimulation. My upward thrusts didn't stop.
—Thud! Thud! Thud!
"Hngh! Ah! Anh! This, Sihyuk, ah! Hwah!"
Chaerin covered her mouth, then shook her head wildly from the mind-breaking pleasure. Yet she never once told me to stop; she just desperately tried to endure. Incredible willpower. Even as I hammered her weak point—the mouth of her womb—with the tip of my cock from below, all she did was cling tightly to my arms.
"Hic, hic, ughhh...!"
Chaerin was making sounds that no longer belonged to a cute girl but to a female in the throes of true climax, edging toward blacking out. Then once more she hugged me tight, kissed me, and came with tremendous force.
"W-wait, w-wait for meee... ahhhh♡ I'm cummiiing♡"
I came with her final climax, pumping into her thoroughly well-used, slick pussy.
When the sex was finally over, Chaerin—who had barely managed not to black out—lay against my arm as a pillow. The room after our sibling sex was filled with a languid heat and the lewd scent the two of us had made. Listening to the breathing of Chaerin resting on my arm, I sank into a strangely peaceful atmosphere. The afterglow of that fierce pleasure made my heart happy, almost like a drug.
Notes, conspiracies—none of it mattered. For this one moment I didn't want to think about anything at all. I just wanted to hold on a little longer to this warmth, this sensation of someone else's body heat beside me.
It was a different kind of security from what I felt with Subin. If being with Subin was like the fluttering thrill of virgin sex with your first girlfriend, then this time with Chaerin felt like the comfort of finally coming home and collapsing onto your own bed. Maybe it was because Chaerin was my only family.
Family, huh...
The moment that word circled through my mind, I suddenly thought of my previous life. Back then, as a child, I had spent so many days just staring at the ceiling. I would look and look and look at the ceiling lit by the blue moonlight coming through the window. I had been alone then...
That was when Chaerin, nestling a little deeper against my chest while I was lost in sentimental thoughts, whispered softly,
"...I love you, Sihyuk."
At that confession I stopped breathing for a moment. Love. Receiving a love confession from Chaerin in this quiet atmosphere—not even in the middle of sex—left me feeling strange.
Thump. Thump. Thump. My heart began to race. The same heart that had only fluttered at Subin's confession now pounded as if it had been struck by something. My body reacted with an almost unnatural intensity. I slowly turned my head and looked down at the face of the twin sister in my arms. The lashes facing mine trembled faintly.
"...Can you say that again?"
There was not a shred of playfulness in my voice. Meeting my deep, serious gaze, Chaerin's face went a little pale. But I could see her gradually steeling herself in her eyes. At first she seemed frightened by the fact that she had confessed; then, as time passed and she sorted her thoughts, she found the courage to open her mouth. In a trembling voice Chaerin poured out the feelings that had festered for more than a decade.
"I mean it. From way back, even before the memories you can't recall... I've always loved you. As the only family I had left, and... as a woman."
Chaerin's confession lodged itself deep in my mind. And at the same time it called up memories that had been sleeping in the depths of me. So without meaning to, I told her the truth I had been hiding.
"...The truth is, I've never been loved by anyone."
That one sentence summed up my previous life. My memories had always been cold. An orphanage where I was abandoned without knowing my parents' faces or their warmth. The empty playground I used to look down on from a battered bunk bed. On weekends, when neatly dressed couples would take other children's hands and leave, I always watched from the window until their backs disappeared. No one ever called my name. No one ever took my hand.
An ugly face and an introverted personality with the presence of a shadow. The girls never gave me a second glance, and the boys never played with me. He—I—had never had a proper friend, let alone a female one. Always alone. The only escape was studying. So I threw myself into my desk like my life depended on it.
My dream wasn't grand. Just a stable job, a respectable business card no one could look down on. And a happy family. And finally, I made it. The day I checked the acceptance text, I stood at a crosswalk with my chest swelling and dreamed of the future for the first time. That now I too could live an ordinary life. That I could love someone ordinarily, and be loved. That I would raise my own child with love, at least.
And then I was hit by a car while crossing that street.
To someone like me, Chaerin had said she loved me.
"...Again. Say it again."
This time it was me who spoke in a trembling voice, barely managing the words. Chaerin looked at me with a blank expression.
"Say what...?"
"That you love me. Say it again."
As if she had read the desperation in me, Chaerin no longer hesitated. She gently cupped my cheek, met my eyes, and whispered with everything she had.
"I love you. I really, truly love you."
"Ah..."
I hadn't known love. I had never received it, so I didn't know. How you do love, what was good about it, how you make a person. Funny enough, after coming to this world I had only been having sex and never loving anyone. Only now did I feel the size of the love another person was giving me. The love Chaerin and Subin had held onto for so long filled the dried-up places in my heart. I could feel it now—what kind of feelings they had been confessing with. Happiness poured out of me as if a faucet that had been stuck shut all this time had finally opened.
So I started to laugh. At first it was just a small chuckle, and then I couldn't hold it in and it burst out of me. Yeah. I understood now. All of this was a reward. If there was a god, he had given me this heaven as a perfect, overwhelming compensation for that viciously unfair previous life. So what if it was fake? So what if it was a dream? The being telling me she loved me right now, Chaerin's warm body, all of this pleasure—it was all so vividly real.
Notes, conspiracies—none of it mattered anymore. I stopped laughing and pulled Chaerin into a deep, fierce embrace. That vague dream I had once held as a child, envying the happy families I saw outside the orphanage window. The dream I had given up on when I was young, the dream I thought had ended in an accident, was now burning inside me as a clear future.
So I confessed to Chaerin.
"Marry me."
"Yeah... wait, what?!"
"I'm going to build a big family."
A family so full of love and warmth that not a single child would ever be lonely the way I had been. A massive family filled with the women who loved me and children who looked like them—a family everyone would envy. I had completely shaken off the ghosts of the past. I was no longer going to be shaken by my previous life or by notes. My heart blazed with a hot ambition aimed at a new goal.
The first step toward my goal of building a large family...
Selecting the women. I would have to choose the ones worthy of becoming my wives.