An affluent medical professor, Komiya, and his bossy wife, Tokio, are to look after Setsuko, their high-spirited niece from Osaka. Setsuko is a liberated woman who does what she wants, including smoking, even though she is a minor. On Saturday, the professor does not feel like going to his weekend golf game, but his wife packs him off anyway. So he leaves his bag at the apartment of his student Okada, and goes to a bar with a friend. Setsuko traces him there, and insists that he take her to a geisha house. When she gets rather tipsy, the professor calls Okada to take her home, while he sleeps at Okada's. The wife becomes suspicious of Setsuko when she sees Okada bringing her home, and also of her husband when she discovers that he did not go golfing.
在过去的几百年里，月球和地球之间的关系终于缓和了，两者建立了“曼辛萨基中央联络港口城市”作为沟通渠道。浅野代也（千叶进步配音）是一个普通的年轻人，曾就读于Manshinasaki大学附属的卡特里娜学院。Daiya很小就失去了父亲，与妹妹Sayaka（本山美奈配音）和妹妹Mayi（安久信配音）过着相互依赖的生活。有一天，Sayaka告诉Daza，月亮公主要来访问地球，他们的家成了公主的临时住所。
首先是两个自杀倾向的学生，害羞内向的市川乐（笠原秀辛 饰）单恋同班同学桂木绫乃（田中丽奈 饰）不成，希望一死了之；绫乃因其富家女身份而受到孤立，倍感绝望。鬼冢以其独特的教育方式，化解了一个又一个难题。 另一方面，女记者喜多岛薰（藤原纪香 饰）错将鬼冢当作通缉犯，时刻跟踪侦查，令鬼冢又气又无奈。 短短的三周转瞬即逝，一切重新归于平静，又与当初有着些许不同……
