At the performing arts division of Seishou Music Academy, the ever-evolving stage threads the lives of its students together as they tirelessly hone their craft. Yet, as the girls prepare for a new rendition of the previous year's performance, the carefree Karen Aijou begins to settle for a smaller role. However, her waning passion is reignited by the return of her childhood friend Hikari Kagura, whose sudden transfer to the academy triggers a flurry of changes in the class dynamics.