Aikatsu Planet!

The story revolves around "Aikatsu Planet," a state-of-the-art virtual world where anyone can assume the role of an avatar and becoming a most popular virtual idol. Mao Otoha, an ordinary first-year student at the private academy Seirei High School, becomes a top idol avatar 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.

(Source: Wikipedia)