Yumi (Yumi Kazama), who majored in liberal arts at a prestigious university, is a wonderful woman brimming with intelligence. There was a time when she aimed to study various literatures, but now she is married and has a son who is a middle school student. One day, her son Tomoki brought his friend Takeshi home to stay because he wanted to study. Takeshi, who was young and handsome, was Yumi's type. As she watched him struggle, the sadistic part within Yumi was stimulated...
