Transferring to an all-boys school, female teacher Kotone quickly becomes a beloved figure among her students. Meanwhile, student Mita, excelling in his exams, persistently asks Kotone to play the flute for him as a personal favor. She agrees, and Mita is thoroughly satisfied. However, their interaction is witnessed by homeroom teacher Kanda. Furthermore, other students who misinterpret the relationship between Mita and Kotone begin expressing their resentment toward her.