Otonokizaka Academy, a traditional high school located in Chiyoda-ku, Tokyo, is facing the crisis of closing down due to a sharp drop in the number of students. Three girls came up with a brilliant idea - to become idols. As long as they become idols, the school's reputation will increase, and the number of students will also increase. In this way, nine girls with distinct personalities decided to work together to become idols, hoping to increase the number of students with the popularity of idols and save their favorite school.