My Little Sister Is the Best F*p Material

Chapter 0: Prologue

I had once dreamed of having sex with my sister and impregnating her. So, I was even more anxious about this situation.

“Hey, at least use some contraception?”

My sister, Miyu, was riding me on the bed. Her small frame was incongruous with her ample breasts, which were now weapon-like, and yet my erect penis stood firm even when it shouldn’t.

“It would be too obvious that way.”

Miyu was cold, businesslike, and only spoke when necessary.

She was an otaku like me, and yet here we were, about to have sex without a condom, and even as siblings. There must be some intention behind it. The discarded pants on the floor and the position she was in left no other possibility but raw sex.

“I’m going to put it in, Onii-chan.”

Miyu didn’t care about my consent and slowly lowered her hips. In sync with her movements, something soft and warm, almost human-like in temperature, enveloped my penis in a sticky embrace.

The swollen, throbbing turtle-like head pried open the tight, narrow obscene passage, and as the tip released its seed, it inched closer to an entrance it should never reach.

“Ah, aahh…!! Miyu, are we really going to… ggh, aahh…!!”

I lost my virginity to my sister with raw sex, and I tried my best to prevent myself from ejaculating inside her.

The folds of skin on my penis stroked it from the tip to the base, taking away my resistance with pleasure. My shaft throbbed, and the sperm in my testicles was drawn up to the urethra as if practicing for ejaculation.

Miyu had only moved her hips a few times, but my penis had already reached its ejaculatory limit.

“Miyu… I can’t take it anymore! I’m going to cum, I’m going to…!!”

“Already? Well, it’s fine.”

Miyu looked down on me indifferently, tucked her long black hair behind her ear, and continued to move her hips. I couldn’t hold back my ejaculation any longer until Miyu would have been satisfied. If we don’t stop, the dream I once had will come true.

As a last resort, I reached out my arm, ready to shove Miyu away and put a stop to the sex. ── However, with impeccable precision, Miyu grasped both of my middle fingers, rendering me unable to even lift my upper body.

“Don’t resist. If you’re going to cum, then cum.”

Miyu’s hips undulated like a rider soothing a restless horse, her breasts bouncing softly with each movement. The more I became aware of the distinctly feminine parts of her body, the more the undeniable fact that I was connected to her very core sent a wave of excitement through me.

The sensation of bare flesh rubbing against each other with mucus in between was transmitted from my groin. With each thrust, Miyu’s love juice made a squelching sound, and by the time I tried to pull out, it was too late.

“Ahh, ahh, ahh, aahh… Miyu…!!”

Slurrr– the first spurt of semen exploded inside Miyu’s vagina. As my brain comprehended the meaning, dopp, dopp, dopp, dopp, a hopeless amount of semen was released. For several seconds, several times, the subsequent ejaculations pushed the semen further in, and all the sperm I could produce at that moment began to swim towards Miyu’s uterus.

“Aahh, ahh…”

An unprecedented wave of pleasure and an aching sense of longing surged through me, draining all the strength from my body. My mind raced—was it still in time for the pill? How could I support Miyu as a man? Thoughts like these spun endlessly in my head, yet the hands that should have been freed could do nothing but grasp at empty space.

“Hmm. So this is how it feels.”

Miyu showed no emotion, never looking pleased, and only uttered a dry comment. As she raised her hips, I felt a hot, sticky liquid dripping down my abdomen.

“Wow, so much is coming out. Onii-chan, you ejaculated too much…”

The person responsible for forcing her own brother to ejaculate was amazed at the amount of semen, but she didn’t seem angry that I had come inside her.

She didn’t make any moans, nor did she scold me for being an early ejaculator. With the same neutral expression as always, she just blinked her long eyelashes. Perhaps this sister had no expression other than a straight face.

“You should be grateful for your studious sister.”

Miyu picked up her pants from the floor and left those words at the end of sex. What was the passion for study that this sister of mine had—what did she even want to confirm by having sex with me?

I would find out about that later, after the summer heat continued to rise.