A century ago, the divine dragon sealed away the Dragon-Slaying Queen as revenge against the kingdom. But through the dedication of the queen's successors, the kingdom has enjoyed great prosperity. Kriemhild, the daughter of the fifth queen, ascends to the throne with the same determination to protect the kingdom. Her elder sister Brunhild fell victim to the corruption of divine power, much like predecessors. Bearing that burden, Kriemhild steps into the throne room. But what awaits her is the kingdom's greatest darkness, known only to those who become queens.