Tomotsu, who usually only masturbates and shows no interest in anything else. Chisato was worried sick about her son like that. One day, Tomotsu came home from school injured, so when she asked him why, he said, "I got zero on a test and was laughed at, so I got angry and fought."... Worried about her son's future, Chisato decided to use her own body to teach Tomotsu his studies so that he wouldn't have to go through any more terrible experiences.
