- Mio Kurasaka (Yuki Amami) is a popular musical actress who hopes to work on Broadway in America. Her agent, though, tells Mio Kurasaka that there are no more auditions for her on Broadway. At that time, Mio's ex-instructor contacts her to reorganize their mothers' chorus group named "Shansonzu," back in their hometown of Yume City.
Yume City is about to be merged and the city plans to build a concert hall, which will be the homebase for the chorus group. The concert hall will also act as a symbol for the newly merged city as it wil be constructed over a former waste disposal site. Under this situation, the mayor's daughter Tadako Isaka (Yuriko Ishida) is also busy reviving the chorus group "Shansonzu". Takako Isaka then meets Mio Kurasaka without her father, the mayor, knowing about the meeting. Mio Kurasaka arrives in her hometown. When Mio faces the members of the chorus group "Shansonzu," she becomes dumbfounded. The skills of the chrous group are amateur at best, but Mio doesn't have other options and decides to go forward with "Shansonzo".