At Shirahamazaka High School, Konatsu Miyamoto, a determined third-year student, yearns to perform at the prestigious annual recital. Despite a setback from the previous year, where she faltered, the vice principal prohibits her participation. Undeterred, Konatsu devises a bold alternative – rather than joining the established choir, she opts to establish her own singing club alongside her friends. However, the journey to assemble a complete group poses unexpected challenges. Wakana Sakai, her friend, has abandoned her singing aspirations, leaving Konatsu with insufficient members. Racing against time with only a month remaining until the recital, Konatsu faces the daunting task of recruiting enough members to realize her dream of performing at this pivotal school event and graduating with no lingering regrets.