Childhood friends Mirai Momoyama and Emo Moegi are first-year middle school students. The two register as a channel on Pri☆Chan with the intention of becoming idols, and along with their classmate, Rinka Aoba, they head out to their favorite Prism Stone Shop. The three of them unexpectedly wandered into another dimension, and the place they found themselves in is the PriPara World...!? Will Mirai, Emo, and Rinka be able to return to their world safely!?