Nami Kuroki, a married home tutor who used to teach at a preparatory school before marriage. She started working as a home tutor again for household expenses after she got married, but her husband is a serious worker, so their nighttime life is simple and she feels unsatisfied. One day, she becomes agitated when a student shows her a smartphone with photos of an affair she was involved in. After that, she is forced to endure a torrent of sexual harassment, and she is treated as a submissive pet who is controlled by not only her student son, but also her friends and father, and falls into becoming a sexual processing toy.