Shizuku returns to the School Idol Club from the Association. She learned a lot. But now, something's different at the School Idol Association. Mia used to write songs at breakneck speeds, but nobody has seen her lately.

The Club receives feedback about their guerrilla gig. All those likes have given everyone confidence. Meanwhile, the Association is worried about Mia's recent disappearance. She seems mature for her age, but she is still a child.

Lanzhu drags Mia out of hiding to hear Mia's new song. It's a polished, high-quality song, but Lanzhu rejects it and demands something better. Mia goes back into hiding to create music that will blow everyone away.

The school monitors have been less strict lately, so the Club decides to do more guerrilla gigs. Wanting to improve, they watch videos of the Association's live shows. Everyone is very impressed, but Rina is not so sure.

The Club members go to cheer on Aqours at their live show. There, they learn that Mia is from an internationally famous musical family. When Rina returns to school, she finds Mia collapsed from hunger, and gets to know Mia better.

The Club's guerrilla gigs are attracting more and more people who share their positive feedback over social media. Mia leaves a negative comment and gets distracted by the Club, though the Association has a live show coming up.

Feeling pressured by the Club's success, Lanzhu is unhappy about the Association's live shows. She blames Mia for not writing a new song yet. Mia says she'll write it, but disappears shortly thereafter. Ai and the others worry.

As a favor to Ai, the School Idol Club searches for Mia, too. Rina, who helped Mia when she was hungry, thinks she knows where to search. There, she learns about Mia's past.

Rina found Mia, and they had a heart-to-heart talk. Afterwards, Rina comes up with an idea to help a burned-out Mia enjoy music again. Rina's idea could potentially also solve the Club's recent problems.

Rina proposes that the next guerrilla gig should be streamed online. The other Club members pitch in with their ideas to make the live show more exciting. It's decided that Mia should be a part of this live show, too.

Mia sings the song she wrote, as a special guest at the Club's online live show. Everyone hears her singing voice for the first time and is amazed at what they hear.