Three months after Poppin’Party's self-sponsored live show, the local live house owners, including CiRCLE's Marina Tsukishima, organize the BanG Dream! Girls Band Challenge, a tournament with the final taking place at the Nippon Budokan. Poppin'Party and Afterglow express their interest in participating, and although Kasumi invites Rokka to join them, she declines as she is still searching for a band. Meanwhile, CHU2 struggles to find a new guitarist for RAISE A SUILEN until she watches Rokka's performance at the cultural festival. CHU2 invites Poppin'Party, Roselia, and Rokka to RAS' latest concert, where she proclaims the band's entry into the Girls Band Challenge and openly offers Rokka an audition, much to her dismay.