The students at Seishou Music Academy's performing arts division share a deep connection through their dedication to perfecting their craft on the ever-changing stage. Karen Aijou, once carefree, now settles for a minor role in the upcoming performance, but her childhood friend Hikari Kagura's sudden transfer to the school sparks a shakeup of the class dynamic and reignites Karen's passion for the art. While exploring the school, Karen discovers a hidden audition battleground where the ultimate victor will earn the title of "Top Star." As she delves into this mysterious competition, Karen learns about the struggles that come with pursuing the top spot. Despite potential fate-driven separations, Karen and Hikari are determined to fulfill their childhood promise of becoming stars together, and must fight to achieve their dreams.