Poppin'Party, an all-girl band, discovers a poster for an event at the famed Nippon Budoukan as their fame grows. Kasumi Toyama and the other members of Poppin'Party are now determined to take part in the "BanG Dream," and they hope to achieve new heights and establish their worth by performing on that renowned stage. Meanwhile, competing band RAISE A SUILEN aspires to change the world with "the strongest music," but is unable to do so due to a lack of a guitarist. Despite the fact that scores of people auditioned for the part, band leader CHU2 believes they are all amateurs who are unfit for the band. One guitarist, though, may be able to live up to CHU2's high standards. Dream of BanG! Poppin'Party, Afterglow, Pastel*Palettes, and Roselia are among the all-girl bands featured in the third season.