1300 years after Gilgamesh sealed the Demon King by sacrificing his life, new King of Heroes would come, inheriting King of Camelot's name. The story about Erix and his servant who were trying to escape from their mad world, then a girl summoned them to a different world called Leavgard, a fantasy world full of mystery and dangerous dungeon. A little did he knew; he was a destined king that would led peoples to fight the demon.