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.
After not performing in RAS' encore, Rokka is chased by CHU2 and PAREO in school and around town the next day, wanting to scout her for RAS. In the meantime, CHU2 meets with Yukina, reiterating her challenge to Roselia.
After the old shopkeepers from the Jizo-dori shopping district break their backs just before their trip to the hot springs, everyone (except CHU2 and PAREO) go in their place. After settling into their rooms, the members from different bands interact and socialize with each other.
After Masuki leaves the impromptu RAS meeting, Rokka looks for her but to no avail. Meanwhile, Rei meets Tae and talks to her whether she still cares about RAS.
In Chiba, Rokka and Masuki search for PAREO by visiting her school. The two spot her as she is walking home, prompting her to run away and for them to give chase. Upon catching up to her, they learn of her background.