JUFD-765 I thought I was seducing my virgin brother, but... it turns out to be a surprise! Oda Mako is a defenseless big-breasted sister who gets fucked by her super-strong younger brother

Mako, a daughter, comes to her parents' house to help with housework after her mother is hospitalized due to illness. While chatting with his father, his younger brother returns, but his attitude is somewhat distant. Mako, who was curious, looked into her room and found out that her younger brother had purchased a masturbation hole. Mako realizes that he is a virgin because he doesn't know how to use it, and teases her, but she has a lot of adolescent power.