Mary, a sophisticated vampire with aspirations of global domination, commands a legion of supernatural beings at her disposal. Viewing herself as the unrivaled queen, she schemes to enroll in a nearby school and manipulate the entire student body into becoming her loyal followers. However, her plans hit a snag with Ippei, a boy who defies her mind control and retains his free will, much to Mary's frustration as he resists her influence in unexpected ways.