As the girls prepare for the festival, they get a request from Y.G. International Academy to do a joint concert. Emma invites Lanzhu but she declines. Kasumi, Rina, Kanata and Emma follow Lanzhu when they hear she's going to have another surprise concert.

Kasumi, Rina, Kanata, and Emma are excited to perform together, but they're all very different. There isn't much time left before the joint concert, so Rina proposes they all take turns to explain what they want to do, but they still can't seem to agree.

Karin meets Misato Kawamoto, Ai's neighbor. Ai invites Karin to go together with them. Meanwhile, the student council decides to merge the School Idol Festival with the Culture Festival, with Shioriko managing both events.