At St. Alcadia Academy, newly arrived boarders Morimoto Leona and Otokawa Saori begin adjusting to campus life amid an undercurrent of ambition. Leona wastes no time asserting her intent to dominate everyone around her, from fellow students to the faculty itself. Unaware of the shifting power balance, boarders Yuuki, Ruri, and Maiko soon attract the attention of the male students whose impulses drive the unfolding events of the day.