Haruko Takanashi (Fukatsu Eri) is 30. She works at a radio station. She is approaching middle management where good looks alone aren't enough. She isn't very romantic so she devotes herself to work and play and suddenly finds herself alone. Just when she has given up on romance she meets a man. She meets him at a party to which she was taken by a subordinate at work. He is 25-year-old Ichiro Kashiwakura (Okada Junichi) and is nothing out of the ordinary. They start a relationship. One day, out of the blue, Ichiro ardently proposes to Haruko. Realizing that he really loves her, Haruko says yes and they get married. But she still hasn't told him her real age.

Now Haruko has to cope with living with Ichiro's mother, Satoko (Kishi Keiko), eldest sister Setsuko (Kaku Chikako) who has returned home, 2nd daughter Kazuko (Harada Tomoyo) who has just returned from a prestigious overseas posting with her company and the third daughter Sachiko (Koyuki) who seems to have reached a bit of a dead end in her life. Competition for Ichiro's attention is only one of many problems that arise.

Cast
* Fukatsu Eri as Takanashi Haruko
* Okada Junichi as Kashiwakura Ichiro
* Kaku Chikako as Komeyama Setsuko
* Harada Tomoyo as Kashiwakura Kazuko
* Koyuki as Kashiwakura Sachiko
* Kishi Keiko as Kashiwakura Satoko
* Suzuki Sawa as Kioroshi Miki
* Tanaka Tetsushi as Takagi Masaru
* Itoh Atsushi as Yamada Daisuke
* Katsuji Ryo as Yoneyama Kenichi
* Katsurayama Shingo as Kitamura Yuji
* Fuji Manami as Radio Personality
* Sakamoto Maaya as Emi