Nina Iseri, a high school dropout who left Kumamoto, arrives in Kawasaki to prove her family she can live by herself.

As Nina enrolls at a college out of a need to advance to university, Momoka brings up the proposition of forming a band upon seeing her skills as a vocalist from their street performance.

The girls discuss on what type of song they should compose as a band. After the meeting Subaru offers to walk Nina home.

While taking a break from rehearsing, Subaru receives a message which prompts her to leave ahead of Nina and Momoka.

Momoka reserves Shin-Kawasaki to a live house gig and tasks each member to sell tickets.

Two girls are shown rewatching Shin-Kawasaki's live house gig before recording a song.

With Rupa and Tomo's inclusion, the girls discuss on renaming the band from Shin-Kawasaki as Momoka is invited by one of her friends to perform at a live house in Suwa.

A flashback shows Momoka and her Diamond Dust bandmates in high school discussing on dropping out to focus on their music career, with an idealistic Momoka assuring they will succeed and not give up.

Togenashi Togeari rehearses a song for the festival; however, Momoka feels their song sounds generic.

As Togenashi Togeari discusses on getting nowhere with their popularity, a talent agency scout named Miura Shiomi approaches them.