Synopsis

The story begins with the execution of Okuma Shiori, the convicted killer behind a shocking string of teacher murders that shook society. At the same moment, protagonist Sakabe Kotaro is transported back in time seven years alongside two of his friends. They find themselves in the midst of the very period when the murders were taking place — and come face to face with a killer they were never meant to meet. But Shiori, a fugitive wanted by the police, looks Kotaro and his friends in the eye and insists: “I didn’t kill anyone.”
 
Kato Seishiro plays Kotaro, a part-time worker who recently quit his job at a life insurance company after four years. In college, he was part of a film club and once dreamed of becoming a director — but a certain incident led him to abandon that path. After crossing paths with Shiori, he chooses to believe her claims of innocence and sets out to uncover the truth behind the murders.