The film is about a mother who often sees her beloved son or has unusual expressions when staying at home, such as going to the toilet for a long time, secretly masturbating with her mother's underwear. It made Reiko Sawamura feel worried, so she confided in her husband, but the husband didn't care much and told her to talk to her son himself to find out what was going on. That night, Reiko accidentally saw her son secretly reading a hentai story, which surprised her very much about this, so at that moment she thought that she would definitely teach her a lesson. Sex education for her son.
