Taira Kei, a famous contemporary dancer, has been failing auditions even though he is talented. One day, Kei sees Nishihara Yui, a chemistry teacher in an all-girls high school, and is immediately attracted to her. Yui who was an armature model before becoming a teacher, is teased by her students and feels like her life has already over for her, since she is already 30 years old and has not been married. One day, Kei waits at the school entrance to meet Yui, but other teachers think he is a stalker and he leaves. However, Yui has been having an affair with a fellow married teacher for 5 years, and has given up on ever being married. The next day, Kei enters the school and give his number to Yui. Yui meets Kei after calling him. Kei asks her to date him, but she runs away thinking he wants to con her. After Kai failed his last audition, and Yui found out her lover is also dating a student, Kai and Yui meet. Kei tells Yui he likes her and they go to his room and have sex.