As Poppin'Party transitions into their second year of high school, new challenges arise, such as student council obligations, tutoring, and part-time work. Their schedules have become so jam-packed that their time together has been drastically reduced, making their memories of joyful moments together feel unattainable. But just when the band was mulling over their predicament, an unfamiliar girl appears, unknowingly thrusting them back into the spotlight. In this time of flourishing all-girl bands, such as Afterglow, Pastel*Palettes, Roselia, and Hello, Happy World!, each group with their own distinct personalities sets the stage ablaze with their unique performances. As Poppin'Party reunites with old friends and embraces new ones, the dazzling, heart-racing music starts to play once more.