ROYD-366 My shut-in sister is a non-stop squirting NEET! After discovering sexual pleasure, we spent another day fucking silently... Miyu Kujou

Hikikomori sister. To me, she was just background noise. She's been wearing the same worn-out t-shirt since forever. Baggy sweatpants. Tissues and phone chargers scattered on the floor. Bad eyesight, not good at talking to people. Of course she's a NEET because she never goes out, what you call a 'rotten girl.' We're siblings. So I didn't have any interest at all.—or so it was supposed to be. That day, I opened my sister's door for a small errand. I didn't knock. I never did. What spread out before me was an incredibly shocking sight. My sister was desperately biting her shirt and lifting her hips. I saw something I shouldn't have. My head went blank in an instant. The worst part was her face. My sister, who usually has deadfish eyes and just stares at her smartphone vacantly, now had an expression like she might be taken away to some distant place but was desperately clinging on. My rationality crumbled with a sound. Even the boundaries as a brother, all at once. By the time I realized it, I was in her room, on top of my sister. Pinning down her resisting arms, forcibly hugging her trembling body. I didn't even know what I was doing. But I couldn't stop. And──I thought your body was dried up like a sun-dried fish, but it was incredibly hot and wet. I lost myself, thrusting my hips over and over. So much so that I didn't notice you were coming. Just kept going deeper and deeper. "Please, no more… I'm coming…" Those words barely reached me from far away. Over and over again. Every time I go deep, my sister's fingers grip the sheets. She lets out a soundless cry and shudders again. But I couldn't stop...