In the world of Naru Ayase, an 8th grader with a unique ability to perceive the hues of music, her dream revolves around owning a shop akin to Dear Crown. When she stumbles upon an opportunity at a newly established store seeking middle schoolers skilled in Prism Dance, Naru eagerly steps into the spotlight. As she delves into Prism Dance during the audition, a mesmerizing aura envelops her, unveiling an unfamiliar sensation. It is then that a enigmatic figure, Rinne, inquires if Naru can witness the enchanting essence of 'rainbow music'.