The fourth season of Uta no☆Prince-sama.
The six members of ST☆RISH, who have made their shocking idol debut, and Nanami Haruka, who has just begun her career as a composer, have advanced to Saotome Academy's master course. As they continue their lessons in earnest to learn how to be top idols and composers, they join Shining Agency and begin to work as entertainers. But before that, some senpai idols and strange foreign idols with a few odd habits stand before them, and they end up getting dragged into the race for a mysterious "Newcomer Award."
Summary taken from: MyAnimeList