A school where the number of male students has drastically decreased, and female students now hold significant power. The protagonist works as a teacher and dorm manager, but the female students are scheming to get rid of him by any means necessary. Desperate to keep his job, the protagonist has been doing everything he can to avoid being kicked out. One day, he discovers a training room in the basement of the dorm. "I want to train the female students who stand up to me here..." He struggles to suppress these dark thoughts with his reason, but while coming in and out of the room, he's spotted by one of the female students. To silence her, the protagonist ends up assaulting the student, and he decides to make this training room his fortress, aiming to take control of the dorm!