To those who wish to go to heaven, kill each other and be the last one standing to survive. This place is called the "school", which lies between the world of the living and heaven. The group of 11 comprised of boys and girls are suddenly forced to participate in a death game hosted by someone who calls themselves "Sensei"! This school decides who dies and who doesn't. Only the person surviving at the end of the game can go to heaven. If one wants to die, they have to kill everyone else. Everyone has their "reasons of wanting to die", but who will be the last one remaining in this corrupted game...?!