Suddenly, the tranquil atmosphere of Ourin Gakuen was disrupted when Kusunoki-sensei, or the subheroine, rose up in rebellion and gained the support of the majority of the students to take control of the school. The head of the institution was overpowered, leaving Yuu Sakurano, Yuzuki Kaede, and Nagomi Fujikura to face the daunting task of reclaiming their school and restoring order. A fierce and unparalleled clash erupted, signaling a fresh chapter in the annals of the school.