"Bands... are always making me dream."
Poppin'Party, Roselia, and RAISE A SUILEN's successful concert at the Budokan has passed.
Kasumi and the others, who have left a lingering sound on the stage of their dreams, are approached by a mysterious woman.
Their next stage is overseas?!
Poppin'Party's music isn't stopping yet!
(Source: BanG Dream! Wiki)