During her parents' two-day trip, the younger sister revealed her desires and was penetrated and ejaculated inside her. (Tojo Natsu DASS-124)

My sister Xia and I have always had a physical relationship. To avoid crossing any boundaries, I went to university far away. One day when I returned home, my sister tempted me to have sex, and in a moment of irrationality, I inserted my penis into her vagina...