One fateful morning, Harihata Haruka encounters a boy named Akitsu Aki, believing him to be a new student. To her surprise, she discovers he is not a peer but her 17-year-old homeroom teacher. As Aki enters the scene, peculiar events unfold in tandem, revealing his role as a logical magician capable of manipulating reality itself. Unveiling a hidden agenda to vanquish lurking adversaries within the school, Haruka becomes increasingly wary of Aki's cryptic actions. In her quest for answers, she unwittingly delves deeper into the enigmatic world of this logical magician.