As a child, Ono Tsubasa saw a Shirato baseball game on TV and was amazed at the Trumpet player in the band playing. Now, in order to play the Trumpet, she enters Shirato High School. There, she meets Yamada Daisuke, a catcher for the baseball team. With each others support, they go towards their dream of playing at Koushien.
| Actor | Role |
|---|---|
 Tao TsuchiyaTsubasa Ono | Tsubasa Ono |
 Ryoma TakeuchiDaisuke Yamada | Daisuke Yamada |
 Shono HayamaAki Mizushima | Aki Mizushima |
 Mirai ShidaYuka Mori | Yuka Mori |
 Arata HoriiYasushi Kido | Yasushi Kido |
 Fujiko KojimaHitomi Kasuga | Hitomi Kasuga |
 Airi MatsuiHimari Wakita | Himari Wakita |
 Yuna TairaAkane Sawa | Akane Sawa |
 Yuki YamadaKota Usui | Kota Usui |
 Juri UenoYoko Sugimura | Yoko Sugimura |
| EEri IkedaShiraoi High School Brass Band Member | Shiraoi High School Brass Band Member |
 Honoka MatsumotoShiraoi High School Brass Band Member | Shiraoi High School Brass Band Member |