The narrative centers on "Aikatsu Planet," a cutting-edge virtual realm where anyone can take on the role of an avatar and become a highly popular virtual idol. Mao Otoha, an ordinary first-year student at the private Seirei High School, assumes the identity of the top idol avatar Hana after Hana's former alter ego, Meisa Hinata, vanishes without a trace. Yet, Mao's new position as Hana's avatar remains a secret from everyone else.