Based on the Japanese manga written by Muneyuki Kaneshiro and illustrated by Akeji Fujimura. Takahata Shun's day at school starts as normal and boring as ever, but it doesn't end like this. After the teacher's head explodes without explanation, he and his colleagues are forced to play children's games, such as Daruma ga Koronda (a game like Red Light / Light Green), with deadly stakes. With the idea of ​​who is behind this deadly and mysterious gaming session, and there is no way to know when it will finally end, the only thing Shun and the other students can do is to keep trying to win ...