As Morimoto Leona settles into St. Alcadia Academy, she begins enforcing her strict vision of control, turning her attention to underperforming students and staff who fail to meet her standards. Otokawa Saori watches the growing influence take hold while trying to adapt to academy life. At the same time, boarders Yuuki, Ruri, and Maiko continue their routines unaware of the changes underway, until encounters with the assertive male students begin to disrupt their sense of security.