Yukina Minato gathers members intertwined with different thoughts to form a band and participate at the Future World Fes. This is the story of their "promise" from their formation to the challenge of the music festival.
| Actor | Role |
|---|---|
 Aina AibaYukina Minato (voice) | Yukina Minato (voice) |
 Haruka KudouSayo Hikawa (voice) | Sayo Hikawa (voice) |
 Yuki NakashimaLisa Imai (voice) | Lisa Imai (voice) |
 Megu SakuragawaAko Udagawa (voice) | Ako Udagawa (voice) |
 Kanon ShizakiRinko Shirokane (voice) | Rinko Shirokane (voice) |
 AimiKasumi Toyama (voice) | Kasumi Toyama (voice) |
 Sae OtsukaTae Hanazono (voice) | Tae Hanazono (voice) |
 Rimi NishimotoRimi Ushigome (voice) | Rimi Ushigome (voice) |
 Ayaka OhashiSaaya Yamabuki (voice) | Saaya Yamabuki (voice) |
 Ayasa ItoArisa Ichigaya (voice) | Arisa Ichigaya (voice) |
 Ari OzawaHina Hikawa (voice) | Hina Hikawa (voice) |
 Yoko HikasaTomoe Udagawa (voice) | Tomoe Udagawa (voice) |
 Toshiyuki MorikawaYukina's father (voice) | Yukina's father (voice) |