The second season of TSUKIPRO THE ANIMATION returns to the four idol units of Tsukino Talent Productions: SolidS, Growth, SOARA and QUELL. All of them are getting ready for the Live 2021 Summer Carnival, a two-day event whose finale brings every unit onto the stage together. Because of how large the stage is and how it is laid out, each group has to prepare fresh songs along with new choreography to match. Along the way, the members bond more closely with their bandmates, handle the drama that comes with idol fame and carry their music out to a wide audience.