Nanako Misonoo enters Seiran Gakuen Girls High School and is assigned to Class B. The school turns out to be a fashionable world led by three beautiful students - Kaoru Orihara, or "General Kaoru," Fukiko Ichinomiya, or "Miya-sama," and Rei Asaka, or "Saint-Just," with lots of wannabes who worship them. She is told that there is a prestigious social club called "Sorority" with very strict criteria in accepting new members. It's planning to choose 10 new members from among the new students.