Haruka Nanami, an aspiring composer from the countryside, longs to write music for her beloved idol, Hayato Ichinose. Determined to accomplish this goal, she enrolls into Saotome Academy, a highly regarded vocational school for the performing arts.

Upon her arrival, Haruka soon learns that everyone on staff, including the headmaster, is either an idol, a composer, or a poet. To top it all off, she is surrounded by incredibly talented future idols and composers, and the competition among the students is fierce; with the possibility of recruitment by the Shining Agency upon graduation, the stakes are incredibly high. As she strives to reach her dream at the academy, one fateful night, a series of events lead Haruka to a mysterious man standing in the moonlight, and he seems a bit familiar...