OYC-246 I'm a shut-in, always observing my younger sister through the peephole in my room. - But one day, my younger sister, who was having sex with her boyfriend, started to feel it even more when she made eye contact with me...?

As a hikikomori, I enjoy observing my younger sister in the next room through the peephole in my room. - My sister, who didn't notice the hole, changed her clothes and lazed around on the bed. - I sometimes masturbate. - One day, when I was peeking in, I started flirting with my boyfriend and it developed into sex! - I couldn't help but be transfixed. - Then, on the way, I met my sister's eyes! - However, my sister continues to have sex as if nothing happened! - Moreover, my younger sister makes eye contact with me many times along the way and cums every time! - I felt like I couldn't say anything...