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.
TOHO, Toho Pictures, Hakuhodo DY Music & Pictures, The Asahi Shimbun, Hakuhodo DY Media Partners, jeki, Shueisha, Nippan Group Holdings, KDDI, Tokyu Agency, Horipro, Marui Group, Hakuhodo, GYAO