GVG-128 Mom's Real Sex Education Reiko Sawamura

With her son Yuki about to take his entrance exams, his mother, Reiko, notices something strange about him and grows increasingly worried. One day, when Reiko returns home, she finds Yuki acting suspiciously as he leaves the bedroom, and finds his underwear in the room, stained with his semen... Reiko begins to counsel Yuki and uses her own body to give him a sex education.