The story revolves around "Aikatsu Planet," a world where anyone can assume the role of an avatar and become an adorably cute idol. Mao Otoha, an ordinary first-year student at the private academy Seirei High School, becomes the idol Hana when Hana's previous alter ego Meisa Hinata suddenly disappeared. However, Mao's new role as the avatar Hana is a secret to everyone else.