Shuichi Kano, a manipulative man who exerts total control over his stepsister Noelle, begins a new position as a professor at the prestigious Takamine College. Using sexual coercion and blackmail, Shuichi quickly establishes a network of spies, including a fellow professor and the Director's niece, Shirone. By exploiting the dark secrets and traumas of those around him, Shuichi begins executing a calculated plan to dismantle the Takamine family from within.
After being targeted by a group of cruel students, the protagonist is "saved" by her brother, whose true motives are finally revealed. Driven by a lifelong vendetta against Director Daizaburo Takamine for the ruin and death of his mother, the brother uses blackmail to reclaim the family college. In a final act of brutal retribution, he forces the Director to witness the desecration of his own daughter, effectively completing his revenge and seeking a new, twisted beginning with his sister.