"If we manage to kill the guys who run the "Program", we can get out of this hell." In a situation as extreme as this "death game", Shinji Mimura, a boy of rare intelligence, not only manufactured a bomb from his hands, but he also developed a careful plan to make disappear the government men present in the annex of the school. All he has left to do is to put this one to execution. And if he hadn't made this unfortunate encounter!!