Hitori Gotou, an extremely shy and socially anxious girl, secretly practices the guitar in the hope of one day performing on stage. When she unexpectedly gets recruited into a band by Nijika Ijichi, a lively drummer, her dream of joining a band begins to unfold. Together with Ryou Yamada and Ikuyo Kita, they form the band Kessoku and embark on a journey filled with music, friendship, and self-discovery.