Miho is a married private tutor who taught at a prep school before getting married. She quit her job after getting married and started tutoring again to make ends meet. However, while her husband is a hardworking, diligent man, their sex life is lackluster, leaving Miho frustrated. One day, one of her students shows her his smartphone, which shows him a video of him having an affair, and she is shocked. From then on, she begins to endure a barrage of sexual harassment, not only against her son, but also against her friend...