"Kill each other. Only the survivor can graduate. Well, that's about it." The day before the graduation ceremony, he locked his students in the music room and spoke a single word. In order to get revenge on the class that had driven his girlfriend to her death , the ordinary "music teacher" transformed into a "music madman." The first full-scale school death game in the history of short dramas, where teachers and students risk their lives to survive, begins here. A madman born from the intolerance of modern society and young people - the heated exchanges in which they risk their lives reflect modern society.