AIKATSU STARS!

Aikatsu Stars! features the protagonist Yume Nijino. Yume aims to become a top idol, and she enrolls in the Yotsuboshi Gakuen. This academy has a special group called the S4, who are the top four active idols in the school. Yume and the other first-year students aim to become a part of the S4.(Source: Anime News Network, edited) — Description from AniList community (anilist.co).