水平線をめざせ！

Nanami Miyao, a high school girl who abandoned her dream of becoming a pianist, moves to a rural seaside town with her mother. She meets Takase, a boy passionate about folk music, and they form a duo called "Ship of the Wind". Together, they practice and perform, aiming for a national folk song competition. Nanami adapts to her new life, picking up baseball and bonding with Takase’s younger sister, Yuka, who harbors feelings for a classmate. Their daily lives intertwine with music and personal growth as they navigate school and relationships. (Unreviewed summary by Grok 3)