GVG-128 My stepmother and the days when my father went on a business trip

Mother 'Reiko' becomes worried when she notices something strange about her son 'Yuki' who is about to take the exam. One day, when Reiko comes home, Courage leaves the bedroom looking suspicious, and there is Reiko's underwear stained with Courage's semen in the room. Reiko encourages courage and sexual education to be courageous with one's own body.