这是一部以尼崎为舞台的家庭喜剧，讲述39岁的单身女性、65岁的乐天派父亲和父亲的20岁再婚对象之间“出乎意料的共同生活”。

39-year-old Yuko is a high-achieving and proud woman whose career ambitions took her from a sleepy part of Amagasaki City, to Tokyo. When she loses her job due to her “high standards” attitude, she loses her drive to do anything and ends up retreating to her family home where she lives as a NEET with her laidback joker of a father, Ryutaro. For years, the two get along until her 70-something old man brings home Saki, his 20-year-old bride-to-be. When the younger woman shacks up with the two, a comedy of manners based, quite understandably, on a scandalised Yuko’s “you’re not my mom!” attitude ensues as the younger woman takes to mothering her but when crises occur, Yuko truly begins to evaluate just what a family can be.

能天気な父のようにはなりたくないと東京の大手企業に就職し、エリート街道をひた走ってきた優子。しかし理不尽なリストラに遭い、39歳にして尼崎の実家に戻ってきた。ところがそんな矢先、父が突然の再婚宣言。しかも相手の早希は20歳の美女だった。はるかに年下の母の登場に優子は戸惑ってしまう。