Together, Asahi and Yamato were invited to an exclusive event by the cellphone-game company "Sky Nova" where they would test a new game. The test players consisted of a diverse group of individuals ranging in age and popularity, including Asahi and some well-known idols. The company arranged for all players to go on a cruise where they explained the rules of the game, which involved treasure-hunting survival on an island. However, during the presentation, all participants suddenly lost consciousness. When they awoke, they found themselves on a real island with a peculiar watch on their wrists reading "Game Start." Now, they must fight to survive in a game that has become all too real and deadly.
