Shioriko's live show was a success, and her strained relationship with her sister Kaoruko has started to show signs of improvement. But why wasn't Lanzhu at the live show?

Lanzhu has made up her mind. Unaware of this, the Association members resume practicing for the school auditions. Their practice is interrupted when some unexpected news arrives.

Lanzhu has abruptly declared that the Association will disband. Unable to contact her, its flustered members ask the Club for help. They realize they don't know anything about Lanzhu. What kind of girl is she at heart?

Shioriko and the girls search for Lanzhu while she roams the streets. She looks up and sees a diner. Before starting the School Idol Association, they came to this diner to discuss the future and envision what might happen.

Lanzhu has decided to disband the Association and return to Hong Kong. She even stops attending school but puts on one last live show for herself. The girls who know about the live show rush to see her. What will they witness?

The girls watched Lanzhu's last show and got to hear her true feelings and voice as a school idol. It strengthens their desire to perform with her even more. But then they hear the shocking news—Lanzhu is returning to Hong Kong!

The members talk with the chairwoman and decide to stop Lanzhu from leaving. What secret plan has Mia thought up to change Lanzhu's mind?

Mia has a secret plan to stop Lanzhu—a song for the three School Idol Association founders, symbolizing a new start. She's using a different composition style to write it, so Mia asks you all to share your memories of Lanzhu.

Lanzhu didn't listen to the new song made for her, Mia, and Shioriko. The girls grow tense when they can't find or reach her. Then they hear that she'll return to Hong Kong that same day. What'll become of her—and the new song?

The girls run after Lanzhu and finally arrive at the airport, despite the present bad weather. Unfortunately, Lanzhu's airplane has already taken off.