Kumiko enrolled in Kitauji High School to wear the sailor uniforms she liked and to get a fresh start. Though she was doubtful, she decided to join the concert band club and continue playing the euphonium. She has a habit of immediately saying what she's thinking and changes her mind easily. She had a falling-out with Reina in middle school. (Source: ANN)

Chisa Kotegawa is a first year student at Izu University. She is the younger sister of Nanaka Kotegawa and cousin of Iori Kitahara. Though generally appearing indifferent, she is very caring and concerning to others close to her. She hates getting hit on by other guys so much she went as far as declaring Iori as her "fake" boyfriend to ward off guys. She loves diving so much that she wants to befriend anyone who is interested in diving and has ocean sounds as her music playlist.