At Seiran Academy, the top high school for admission to the University of Tokyo, genius student Akane Nakano, the first student in the school's history to achieve perfect scores in all entrance exams, found life boring and meaningless due to her exceptional intelligence. However, after hearing about a murder in the city and meeting a young man named Yuu Kurokawa, who is suspected to be the culprit, she becomes fascinated by the unseen world of crime and starts causing small incidents at school. Eventually, a real murder occurs at the school, leading to an unprecedented series of murders that will shock Japan...