23 people participate in a game of psychological warfare in which they wear a special device called “SCM” which can be used to turn other players into their slaves. Eia Arakawa, is a girl with a cold personality who dabbles in various romances without taking anything too seriously. Meanwhile, Yuuga Oota is an eloquent, smart young man who gradually descends into insanity when he becomes wrapped up in the darkness of the game. A fierce survival game for their own purposes.