When my parents remarried, I suddenly had a sister! Moreover, because my room is the only child's room, I decided to use it. I was worried ... A word hurt, "dassa ..." in an otaku room. But this sister is really a Tsundere! I was a virgin, and I was too young to make a brush as if to ridicule me, or to suck my dick when my parents were not by my side! A sister (Gal) and a younger brother (Otaku) have different clothes, personalities and interests living together in the way of incest!