New boarding students Morimoto Leona and Otokawa Saori arrive at St. Alcadia Academy, eager to settle into their new surroundings. Leona quickly begins asserting her will over those around her, targeting anyone she deems unworthy of her notice, including instructors. Fellow residents Yuuki, Ruri, and Maiko, still unaware of the shifting tensions, soon find themselves caught up in the academy's charged atmosphere as male students pursue their own unchecked impulses. The first episode establishes the rivalries and power plays that will shape their time at the school.