Uzuki and Rin come to 346 Production for the first time. They meet the final member who won the idol version of a “second chance sweepstakes,” Mio Honda, as well as the 12 other eccentric members, and thus the project can finally start. The first job for the three newcomers is to do a publicity shoot, but their nervousness threatens to derail the whole thing. Somehow, they get through it, and well enough to impress superidol Mika Jougasaki, who suddenly hires the trio to be her backup dancers for an upcoming concert!

Utsuki, Rin and Mio start taking lessons to train to be Mika’s back dancers. It’s a long, hard struggle, but thanks to the encouragement of the other project members, they somehow make it. But the pressure of being on stage for the first time has stressed the trio out so much that even the final rehearsal doesn’t go well. Will they be able to get it together for the actual concert?

Miku Maekawa and Riina Tada are going to make their debut as the Cinderella Project's final unit. However, Miku aims to be a cute, cat-eared idol, while Riina's goal is to become a cool rock idol. The two are like oil and water, and both are strongly opposed to the unit idea. But when their participation in the units-only summer festival is on the line, they make an effort to get on the same wavelength, starting with becoming roommates!

The summer fest is here at last. All of the project members are nervous about performing on the grand stage, but their rehearsals go smoothly thanks to Minami's leadership. But then Minami collapses from accumulated stress. Ranko does an emergency fill in for Minami with Love Laika and somehow, the rest of the Cinderella Project's performances go off without a hitch... until a sudden downpour causes the rest of the concert to be canceled!

The fall fest held by 346 Production has begun at last. The Cinderella Project idols are each determined in their own way and fired up as they face the concert. Per Producer's decision, New Generations is sitting the concert out, but Mio and Uzuki are on hand as staff to support the others, while Rin performs with Karen and Nao to make their concert debut as Triad Primus.

Meanwhile, Anastasia performs solo for the first time on stage and all the other Cinderella Project idols shine more than ever. On the other hand, it's the first time for the Project Krone idols to be on stage. Their nervousness reaches its peak right as they're about to go on...

The Cinderella's Ball finally begins, with the Cinderella Project girls encouraged by Producer to smile as they do each of their routines.