Mio has loved reading since she was young and entered the national literature department, at one point aiming to become a literature researcher. - However, she is now married to her husband, whom she met at university, and they have a son together. - Although her children are cute, she is beginning to feel bored with the life of an ordinary housewife. - At that time, my son decided to bring his friends over to hold a study session, and Mio was to serve as the instructor... - As she interacts with her son's young friends, Mio's sadistic side is stimulated...