Lanzhu and Mia arrive in Japan. The School Idol Club starts creating a promotional video for the 2nd School Idol Festival.

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.

Shioriko arranges a pre-show produced by the drama club for the day before the cultural fair. Later, Shizuku tells Yu that she wants to create a unit and perform with Ayumu and Setsuna at the Fair. The next morning, Ayumu and Setsuna follows Yu and Shizuku after finding them together.

Setsuna hesitates revealing her identity as Nana Nakagawa, as she thinks her personas should be kept separate. Meanwhile, Kaoruko Mifune, a new music course teacher, praises Yu about the combined event.

The Joint Festival begins. During their time at Shion Academy, the club learns of Kaoruko's past as a school idol, and how Shioriko, her younger sister, looked up to her, hoping to be a school idol herself.

The final day of the 2nd School Idol Festival has arrived. Today, the festival is happening along with Nijigasaki's cultural fair. But Yu still hasn't finished writing the song for the School Idol Club because she wants to make it the best song possible.

The 2nd School Idol Festival came to a successful close. But then Lanzhu tells the girls that she's going to quit being a school idol and head back to Hong Kong. Mia asks her why she's going home, but Lanzhu just says she's done everything she wanted to.

Second-year Yu Takasaki joins Nijigasaki High School’s idol club with the dream of helping every member make theirs come true!

Second-year Yu Takasaki joins Nijigasaki High School’s idol club with the dream of helping every member make theirs come true!

The School Idol Club is being officially recognized by the school?! Kasumi overhears this news and runs to the club room to tell everyone, only to find out it's just a rumor. But then the girls actually consider what going official could entail for them.