Segawa Kiichi or otherwise known as "Keebou" has recently moved back to his hometown due to a business transfer after years of life in Tokyo. Kiichi is a mediocre salesman for a medical-equipment manufacturer.

One day, when he goes drinking at a hostess pub with one of his colleagues, he is confronted with a former gang member turned yakuza leader, Tagawa. Kiichi used to be a leader of a small gang called "Who Are You" back in his youth himself and the two are familiar faces. Tagawa tells his group that Kiichi let his own team get beaten up ten years ago and that he is the most cowardly living man of the century. Tagawa and his yakuza group have captured a 10-year-old girl for some reason, and although he does not want to get involved at first, Kiichi ends up helping the little girl escape from them. Soon, he pays the price for it. When members of Kiichi's old gang, "Who Are You" learn of their leader's return and the adverse circumstance he is in, they round up to take on the yakuza to save him despite their resentment for their leader's betrayal a decade ago.

The president's daughter, Yoon Jae-hee (Jun Do-yeon) is a Korean diplomat in Prague. She has only recently recovered from a devastating break up five years earlier with Ji Young-woo (Kim Min-joon), the son of a prominent Korean businessman. Choi Sang-hyun (Kim Joo-hyuk) is a detective who goes to Prague searching for his ex-girlfriend Hye-joo (Yoon Se-ah). Hye-joo broke up with Sang-hyun over the phone from Prague and Sang-hyun can not accept it.

Sang-hyun meets Jae-hee in Prague and misunderstandings abound. Eventually the two help each other and become friends. When they return to Korea love blossoms, but their respective ex's and very different social status put it to the test.

Kozue Ogawa is a housewife and has been married to Hideo for seven years. They don't have any children, but as they live with her parents at their flower shop, every day is still lively. She is happy with her life and her husband, but she wonders if it is enough. From time to time, she is gripped by this doubt that she cannot raise with anyone. Kozue starts a part-time job in the editing department of the magazine where she used to work. Her former colleague is now working hard as the editor-in-chief. One rainy day, Kozue meets a young man. He is Takuma Fukazawa, a high school student. He seems somehow shrouded in sadness. He is a dance teacher. In the dance studio, there is just the two of them. Takuma curls his hands around Kozue's body, and his dance instruction begins. Their unexpected closeness causes Kozue to hesitate. With her heart pounding, she pushes Takuma's hands away and runs home. But the throbbing in her chest continues. It can't be. But what is this feeling?

This trilogy drama is about Gong Seon Hwa (32 years old), a social welfare worker who's getting married to Kang Won Hyung (30 years old), a Korean culinary chef, portrayed by Ji il Joo.

This drama shows how devastating and hurtful it can be for a woman to live with a boyfriend before marriage and not end up tying a knot with him. Korea has the second highest divorce rate in the world as more and more families become ruined -- mainly because one of the spouses cheats. To make things worse, the mass media continues to champion premarital cohabitation as a choice that unmarried couples are free to make. Terms of Endearment depicts today's harsh reality and once again reminds us of the sacred meaning of marriage and the importance of family.

Yosuke Tomikawa (Tomokazu Miura) is married to Mizuki (Hitomi Kuroki). They have a daughter, Shiori (Atsuko Maeda), and son, Ko (Asuka Kudo). Yosuke works as the general manager in the personnel department at a large company. His wife works as a teacher at a private middle school. Their daughter works as a jewelry maker and their son is looking for a job. The family appears to look like a peaceful family, but, due to an accidental opportunity, the family begins to collapse.