Female teacher Koto-ne, assigned to an all-boys school, is the object of admiration for her students. One student, Mitsuta, begs Koto-ne to play her signature flute solo just for him if he does well on his tests. Mitsuta's wish comes true, but this scene is witnessed by Kinda, the homeroom teacher who harbors feelings for Koto-ne. Moreover, other students who misunderstand Koto-ne's relationship with Mitsuta confront her.
