Signal 100 (Japanese: シグナル100信号) is a psychological thriller manga written by Miyatsuki Arata and drawn by Kondou Shigere. The story followed a group of high school students in a death game which they are forced into play by their homeroom teacher, whom they bullied into suicide. As a highly trained psychologist, before the teacher killed himself, he hypnotized the whole class, where they are force to kill themselves if they commit certain action.
