Shun Takahata is a second-year high school student who leads a typical adolescent life until one day he is drawn into a series of kid-only games like “Daruma-san ga Koronda” where losing results in death. He has no choice but to keep winning as he has no idea who is behind the games and it’s the only way he can keep Ichika, his childhood buddy, safe. Takeru, a troubled classmate, appears to be enjoying the chance to kill other classmates in the meantime.