In search of the Demon Sword "Morgif," Yuri and his group arrive at Van der Veer Island. They discover Morgif lying under a mountain spring, but Yuri alone must retrieve the sword since it can be handled only by a Demon King. Still, even as the Demon King, it is a huge challenge. Other humans have perished trying to get the sword! Can Yuri accomplish this feat without sacrificing himself? Later, the King's oracle Ulrike perceives that something ominous is about to happen. Danger closes in on Yuri once again as he attempts to recover a stolen treasure called "Stone of the Dragon King." Meanwhile, Stoffel, the regency of the previous monarch, plans a rebellion against Yuri to take control of the Great Demon Kingdom himself