The last day of the Joint Festival begins, however, Yu still cannot write a song for the Festival's closing performance. Later, the Nagashi Somen Club sends a boat through a water slider track, with plans to begin Lanzhu's performance after it finishes.
Lanzhu decides to go back to Hong Kong, shocking the School Idol Club. Mia then goes to Lanzhu's apartment, where Lanzhu explains that she has done everything she wanted. Mia then decides to write one more song for Lanzhu.
Kasumi invites the Club to go on a trip to show that she is still the Club president. Kasumi plans multiple activities on the trip, hoping to show herself off. The next day, Rina creates a game for the group to play while they walk around the city.
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.
Kasumi refuses to accept the fact that the School Idol Club has been disbanded and decides to take matters into her own hands. Meanwhile, Karin tries to track down the elusive Setsuna Yuki.
Rina has always had a hard time communicating with others, but after joining the School Idol Club, she makes the decision to try to change once and for all by putting on a solo performance.
Yu becomes interested in school idols after watching a performance of Setsuna Yuki and wants to join a School Idol Club with her childhood friend Ayumu.
Kanata's little sister, Haruka, is a school idol at Shinonome Academy and comes to visit Kanata at her club one day. The sisters are very close, but Haruka is worried that Kanata is pushing herself too hard and makes a drastic decision.
Shizuku lands the leading role in an upcoming play for a joint drama festival Nijigasaki and another school are having. However, she loses the role when the Drama Club president tells her that she's unable to truly put herself out there.