Transferring to a new school might be difficult, especially if you don't want to make any new acquaintances, like Nobuaki Kanazawa does. But the reason for his antisocial conduct becomes evident when his class receives a text from "The King," which includes instructions for the "King's Game," in which all class members must play. Those who refuse to play, stop midway, or do not follow an instruction within the specified time of 24 hours will be executed.