STAR-677 — Matsuoka China - My Overdeveloped Big-Breasted Sister Is My Obedient Masochistic Sex Pet

China, a sister with overdeveloped H-cup breasts, is violated by her perverted brother. The brother has sexual feelings for his sister, and one day when a classmate comes to deliver a notebook, he mistakes him for her boyfriend and rapes her out of jealousy... and from that day on, he continues to violate her as a sex toy every day. Eventually, the sister, trained to be a masochist, becomes submissive to her brother and falls into the role of a slut, begging for his erect cock...