In the late Tokugawa Shogunate, Asa was born as the second daughter of a wealthy merchant in Kyoto, Japan. Later, in Osaka, Asa entered various business fields like coal mines, banks, life insurance. She also founded the first female university in Japan.
Etsuko Kono (Satomi Ishihara) is a 28-year-old woman who loves fashion. Aspiring to become a fashion editor, she joins a publishing company, but she is sent to work in copy editing section. There, her job is to correct errors and inadequate parts of documents and copies.
Yu Takada (Ryosuke Yamada) works at a company. Since he was a kid, his father has always favored his smarter, older brother. His father doesn't seem to care much about Yu, but Yu craves affection from his father.
One day, Yu meets a woman by chance. That experience wasn't that good, but he begins to have feelings for her. Yu then learns she is his older brother's girlfriend.
Michiko Daimon (Ryoko Yonekura) goes up against Shigekatsu Hiruma (Toshiyuki Nishida). Shigekatsu Hiruma is a new director for the best university hospital in Japan and also bears a deep grudge against Michiko Daimon.
Kie Hirano (Haruka Ayase) is an ordinary OL who often daydreams. Mitsumasa Kodai (Takumi Saito) at the same company as Kie Hirano, but he is an elite salaryman. He is the eldest son in the Kodai family and he is also telepathic. Mitsumasa Kodai got his special ability to read other people's mind from his British grandmother.
Mitsumasa becomes attracted to Kie's warm heart and her dreamy temperament. They begin to date and enjoy their days together, but Mitsumasa Kodai's mother calls.
Mikuri Moriyama (Yui Aragaki) is 25 years old. She doesn't have a boyfriend and doesn't have a job even though she holds a graduate degree. Everyday, Mikuri Moriyama has a feeling that she is not needed. Her father, unable to see her suffering anymore, arranges for her to work as a housekeeper. Her employer is 36 year old Hiramasa Tsuzaki. He is single and works for a company. A series of events leads them to marry as a working condition.
Rookie detective Tatsuya Sumire dreamed of being like the hot-blooded detectives who appear in detective dramas. However, the first order he gets from his superior is to infiltrate a programme as an idol in order to solve cases occurring in the entertainment industry. And so, the idol ‘Deka Dance’ is formed impromptu. Tatsuya is initially bewildered by the special world of the entertainment industry but somehow gets popular each time he solves a case. And then he gradually becomes aware of himself as an idol.
Kinshiro Toyama (Hiroshi Tamaki) is the new chief at Kitamachi police station. He is enthusiastic to solve cases which interests him. He bickers over pretty much everything with veteran detective Yozo Minami (Masahiro Takashima). Minori Aikawa (Miori Takimoto) is a rookie detective who wants to become a veteran detective.
Yoichi Haruno (Hiroshi Tamaki) is 35-years-old and works for a company. His wife, Chisato (Kana Kurashina), is 28-years-old. Before they had a child, their marriage life was easygoing. After having their child, their relationship changes. Yoichi feels that Chisato is cold to him, but he doesn't know why.