
S01E01 The Human Chair (1)
One morning, a junior-high student, Kobayashi, wakes up and finds himself in his classroom with his homeroom teacher’s body. In his hand is a murder weapon. A high-school detective, Akechi, is called in to assist...
The man pulling the strings of the latest Twenty Faces crime was Namikoshi, who everyone thought died three years ago. He starts talking about his junior high school days and how he came to start working on the formula with Akechi.
The story takes place at a certain middle school where several murder cases take place. Kobayashi, a boy who goes to this school, meets genius detective Akechi, who comes to the school to investigate. Kobayashi takes an interest in Akechi and, in spite of his friend Hashiba's worries, he volunteers to be Akechi's assistant.