Naru Ayase is an eighth-grader who perceives the colors of music when she listens to it. For Naru, who excels at decorating, owning a shop like Dear Crown was her dream. One day, she discovers that the manager of a newly opened shop is recruiting middle school girls capable of Prism Dance, and she applies immediately. Naru begins to Prism Dance at the audition, and an aura she has never experienced spreads out before her. At that moment, a mysterious girl named Rinne asks her if she can see "rainbow music."