Kimi ga Hoeru Tame no Uta wo,

High school student Haru Oogami struggles with her childlike appearance and unexpectedly deep voice, so she secretly posts videos of herself singing online. When her classmate Yuu Narumiya discovers the videos, Haru expects to be mocked. Instead, Yuu invites her to form a musical group. Together, the two girls begin a story of music and youth, each carrying burdens from the past.