Naru Ayase, an eighth-grade student, possesses a unique talent: she sees colors whenever she listens to music. Her passion for decorating has always led her to dream of owning a shop like Dear Crown. When she discovers that a newly opened store is recruiting middle school girls with Prism Dance talent, Naru jumps at the chance to make her dream a reality. Without hesitation, Naru applies and auditions for the position. During her performance, she feels an unusual energy in the air. A mysterious girl named Rinne approaches her and asks if she can see "rainbow music."