Based on the game by Active. The popular Discipline series returns with this new original story, set before the arrival of Hayami Takuro, the protagonist of the first series. Morimoto Leona and Otokawa Saori are newly arrived boarding students at St. Alcadia Academy. Morimoto Leona aims to subjugate everyone in the school, severely punishing those she deems useless. Even the teachers are not spared. Fellow boarders Yuuki, Ruri, and Maiko, unaware of the situation, fall victim to the boundless sexual desires of the male students.