| Spring in the first year of high school. Kumiko, a member of the brass band in junior high school, visits the high school brass band club with classmates Hazuki and Sapphire. There, she comes across Reina, her former classmate from junior high. Hazuki and Sapphire decide to join the club, but Kumiko can’t make up her mind. She recollects her experience with Reina at a competition in junior high school. |
| Name | Character | Episodes |
|---|---|---|
| Ayaka Asai | Hazuki Katou (voice) | 50 |
| Tomoyo Kurosawa | Kumiko Oumae (voice) | 39 |
| Takahiro Sakurai | Noboru Taki (voice) | 38 |
| Minako Kotobuki | Asuka Tanaka (voice) | 28 |
| Saori Hayami | Haruka Ogasara (voice) | 26 |
| Aya Hisakawa | Michie Matsumoto (voice) | 21 |
| Manami Numakura | Mamiko Oumae (voice) | 15 |
| Haruka Tomatsu | Mayu Kuroe (voice) | 13 |
| Yuichi Nakamura | Masahiro Hashimoto (voice) | 12 |
| Atsumi Tanezaki | Mizore Yoroizuka (voice) | 11 |
| Nao Toyama | Nozomi Kasaki (voice) | 10 |
| Yoko Hikasa | Aoi Saitou (voice) | 8 |
| Shimba Tsuchiya | Motomu Tsukinaga (voice) | 7 |
| Yoko Hikasa | Concert Band Member (voice) | 4 |
| Takahiro Sakurai | Concert Band Member (voice) | 1 |
| Momo Asakura | Concert Band Member (voice) | 1 |
| Atsumi Tanezaki | Additional Voices (voice) | 1 |
| Kikuko Inoue | Naomi Kousaka (voice) | 1 |
| Kengo Kawanishi | Concert Band Member (voice) | 1 |
| Masashi Ebara | Genichirou Tsukinaga (voice) | 1 |
| Manami Numakura | Concert Band Member (voice) | 1 |