JUFD-765 I thought I was trying to seduce my virgin brother... but it turned out to be a complete turnaround! - Mako Oda, a defenseless big-breasted sister who gets fucked by her ultra-obsessed younger brother

Mako, a daughter, comes to her parents' house to help with the housework after her mother is hospitalized due to illness. - While I was chatting with my father, my younger brother came home, but he seemed aloof. - Curious, Mako looked into the room and found that her younger brother had purchased a masturbator. - Mako realizes that he is a virgin because he doesn't know how to use her, and tries to tease him, but she is pushed down by the power of adolescence. - From that day on, he was forced to follow his younger brother's sexual desires.