Reiko is a married private tutor who used to work as a tutor at a cram school before she got married. She started working as a private tutor again for her family's finances, which she quit after getting married. However, although her husband is a good, serious worker, her night life is indifferent and frustrating. Then, Reiko is upset when a student in her charge shows her a smartphone with a picture of an adulterous affair on it. From then on, she is forced to engage in raging sexual harassment, not only against her student son, but also against her friend...