The series features a new protagonist named Yume Nijino. Yume aims to become a top idol, and she, and her childhood friend Koharu, enroll in Yotsuboshi Gakuen (Four Star Academy). She also receives attention from a male idol named Subaru, who is a popular male idol from M4 and who has possibilities of having a crush on Yume due to his way of speaking and body language when she is around him. He also cares a lot for her. She also meets Rola Sakuraba, Ako Saotome and Mahiru Kasumi who become here great friends. The academy has a special group called S4, who are the top four idols in the school. There are four classes Flower Song Class, Bird Theatre Class, Wind Dance Class, and Moon Beauty Class. Yume and the other first-year students aim to become a part of the S4.
