Ou to Neko no Hihou
The Treasure of The King and The Cat·王と猫の秘宝
A sudden disappearance of many people shocks the royal capital. Young King Castio investigates and discovers the responsible party, only to be cursed. He summons wizard O'Feuille, Prince Volks, and Nios, his trusted retainer, to assist in unraveling the peculiar case involving cats, swords, and magic.