Oumae Kumiko, who is looking forward to sailor suit, entered Beiyuzhi High School, and has no special skills. However, in high school, he also played the Youfeng horn in the Blowing Music Department. He is easily influenced by others and has the habit of speaking his mind directly. He is quite concerned about what he said to Li Nai during the junior high school competition, and plays the musical instrument: Youfeng horn.

Hazuki Kato, who belonged to the tennis department in the middle age, was a beginner of musical instruments who wanted to play the trumpet and entered the music department, but turned out to be a tuba player, an activist, a cheerful and lively atmosphere maker and an instrument: tuba.

Chuan Dao Luhui, a junior high school student, played the double bass. Because of the hope of continuing to play musical instruments happily, I joined the playing department in high school. Optimistic personality, but very concerned about his name, as an instrument: double bass.

Kousaka Reina and Kimyou Kumiko were born in the same junior high school. Influenced by the father of a professional performer, they began to play the trumpet at an early age, and continued to play the trumpet in the music department in high school. Self-disciplined and calm, as a musical instrument: trumpet.

Asuka Tanaka, a junior in high school, is the deputy director of the Music Department. He often orders people around him with plain words and deeds. The rimmed glasses are its registered trademark and play the musical instrument: Youfeng Horn.