Yume Nijino aims to become a top idol, and she enrolls in the Yotsuboshi Gakuen (Four Stars Academy). 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.
Season 1
The story follows a girl named Yume Nijino who enrolls at Yotsuboshi Gakuen (Four Star Academy) in order to become a top idol and join the popular group S4 which she admires.
Season 2
An idol academy in the form of a luxurious cruise ship suddenly appears, and it's name is the Venus Ark! The one leading the cruise is the perfect idol, Elza Forte!!