Yuto Takamine and his younger sister-in-law, Kaori, were visiting their parents' grave when they were suddenly summoned to another world called Phantasmagoria. The King and a woman named Restina took Kaori hostage and ordered Yuto to fight their enemies. The King then gave him a sword named Motomeh to protect their kingdom from enemy spirits. Kaori will only be freed if Yuto helps protect Phantasmagoria. Thus, Yuto's journey begins...