Kotone, a female teacher assigned to a boys' school, is the object of admiration for the students. If one of her students, Mita, does well in her exams, she begs Kotone to let her play the flute just for her. Mita's wish came true, but the situation was witnessed by Kaneda, the head of the grade who has feelings for Kotone. Also, other students who misunderstood her relationship with Mita approach Kotone.
