Rated: Rated PG
Childhood friends Haruta and Chika are members of their high school wind instrument club that is on the verge of being shutdown because there are only four members. When a mysterious event occurs within their school, they band together in order to solve the mystery.
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A first year high school student who quit her volleyball club, in spite of being a powerful player, to join the wind instrument club in an effort to become more feminine. She is Haruta's childhood friend.
A first year high school student who is in the wind instruments club. He plays the horn and is Chika's childhood friend.
He was once a conductor as he had hoped of becoming, but now this mysterious 26-year-old serves as the advisor of the Wind Instument Club.
"Niji wo Ametara" by fhána
"Kuusou Triangle" by ChouCho
Sarah Emi Bridcutt as Homura Chika; Saito Soma as Kamijou Haruta; Hanae Natsuki as Kusakabe Shinjirou