No Game No Life

Two siblings are known to be two of the mysterious blank gamers they are called this because they never fill in their name. Blank gamers are considered to be the best gamers in the world having never lost a game no matter what game. The two siblings one day get a mysterious email and finally teleported onto an other world. The God of this world stated that their be no wars, no stealing and no violence instead everything is decided with a game, any game.