Synopsis
Mia Ageha decides to join Pretty Top School in order to challenge Aira Harune, the current Prism Queen. Mia, along with fellow trainees Reina Miyama, Karin Shijimi, and Ayami Ōruri, debut as Prizmmy. At the same time, Pretty Top School (owned by Kyoko Asechi) gains five international students from South Korea — Hye-in, Shi-yoon, Jae-eun, Chae-kyoung, and So-min — who debut as Puretty. While keeping up with their idol activities, both groups also enter the Symphonia Series tournaments, with prizes consisting of rare Prism Stones consisting various clothing from the Symphonia Series, a line created by Kintaro Asechi. In the process, they learn how to perform Prism Acts, a finishing move at the end of a Prism Show that includes a short acting performance.
As Prizmmy and Puretty's skills grow, Don Bomby, the host of the Symphonia Series, manipulates Pretty Top School into entering them into more Symphonia Series tournaments. Revealing himself as Kintaro Asechi, he hopes to realize his dream of performing "Grateful Symphonia", an ultimate Prism Act that will change the landscape of Prism Shows and end the need for competitive tournaments. Kintaro targets Aira as the performer of "Grateful Symphonia" and begins sniping all Prism Stars who lose against her to be in his company. In order to combat him, the outfits from the Symphonia Series tournaments are remade with purer thoughts to help Prizmmy and Puretty defeat Aira in the Sky High Symphonia tournament.
After Pretty Top School and Aira are saved, Kintaro sabotages Kyoko's reputation by revealing he used his connections to influence her Prism Star career in the past, and this causes Prism Shows to lose popularity. In order to heal Kintaro and change the public's favor, the acts at Pretty Top School agree to perform "Grateful Symphonia." The Grateful Symphonia tournament is held to decide the center dance position in "Grateful Symphonia", but Mia and Hye-in tie, and Pretty Top School decides to perform "Grateful Symphonia" for the Goddess of the Prism Shows to decide. During "Grateful Symphonia", Kintaro intervenes, but Mia convinces him that competitive Prism Shows and her friendly rivalry with Hye-in motivate her to grow as a better performer. Mia and Hye-in's friendship causes the Goddess to crown them both as the centers, and together, the acts at Pretty Top School complete the "Grateful Symphonia" and Prism Shows are saved. Afterwards, the characters move on with their lives and careers.