S1·E3 A ball is resplendent, enjoyable, and...

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?