GVG-128 — Mom's Real Sex Education Reiko Sawamura

A mother named Reiko notices something strange about her son Yuki, who is about to take an entrance exam, and grows increasingly worried. One day, when Reiko comes home, Yuki leaves the bedroom acting suspiciously, and she finds Reiko's underwear in the room, with Yuki's semen on it... Reiko counsels Yuki and uses her own body to give him a sex education.