When Hibio's adventurer mother sets off to research a mysterious tribe, she hits a wall. Fortunately for her, the beautiful young Nima sees a family portrait and decides that she wants her son for her husband, giving her a chance to further her research. She agrees to the arrangement. Of course, she doesn't consult him about his future bride. When Nima shows up in Tokyo to be with her new husband, hilarity and chaos ensue as Hibio and his modern Tokyo background meet Nima's magical heritage.