Follow the story of a gladiator from the past who was forced to travel into the future by a whimsical idea of a God.He then encounter a young man whom in turn introduced him into the world of gaming. His fate was once then again turned when a certain game they have played turned out to be a Death game, trapping them inside the gaming world for eternity.Unless they conquer the world by conquest and unravel the true identity of the demon lord to be sealed, for the demon lord was only a mere title which gives the bearer tremendous chaotic power. Thus sealing the bearer for eternity is the only method.