After an eye-opening trip to Tokyo, Chika Takami, a seemingly ordinary high schooler, stumbles upon the captivating world of school idols. Determined to emulate the legendary group μ's, she sets out to establish a school idol club at Uranohoshi Girl's High School. However, her plans hit a roadblock in the form of the stern student council president, Dia Kurosawa, who opposes the club's formation. Just when the odds seem stacked against her, Chika encounters Riko Sakurauchi, a talented pianist and transfer student. Despite Riko's initial reluctance, Chika sees her as a valuable addition to the group. With unwavering resolve, Chika embarks on a journey to create a school idol group that will rival the brilliance of its predecessors, refusing to let anything stand in her way.