her mother

As her daughter Miki's entrance exams are nearing the end, Elena begins a relationship with her tutor, Oshima, who comes and goes frequently. Miki gradually begins to doubt the relationship between Elena and Oshima, who continue their relationship even though she knows it's wrong. One day, Miki witnesses the two of them devouring each other, takes out her anger on her mother, and leaves the scene. Left alone, Elena feels lonely and approaches her daughter's boyfriend, Yu, who was present at the scene, but...