Three years have passed since the events of Aurora Dream... At Pretty Top, a new generation of girls dreaming of being Prism Stars have endeavored through their training. One day, Ayami, Karin and Reina find themselves on the same stage as their predecessors, when Ageha Mia suddenly jumps up on stage and demands to challenge the legendary Prism Show unit MARs.

To keep this challenge, the 4 girls are sent to become a new Prism Show unit, Prizmmy?. As the girls waver and then jump back up, they deepen their friendship and aim for their debut together. To add to it all, 5 girls have come from abroad to Japan to study at Pretty Top to have their debut as well. In order to meet their future, the girls stand on the stage, and the show starts.