Lee Hwang, eldest daughter (actress Moon So-ri)
Married for five years. A designer of book covers.
Having sophisticated looks and a firm, supple body, she is an egoist who is self-absorbed and cares more about herself than her own daughter. She has a fiery temper and acts impulsively, displaying erratic behavior. She gets involved in an affair in the very first episode of the TV series. The affair takes place when she participates at the Tokyo Book Fair and meets an old flame.

Yoo Tae-il (actor Lee Jong-won)
Lee Hwang’s husband. He was smitten in love with Lee Hwang when he first laid his eyes on her in college and asked her out on a date. After he married her, Lee Hwang gave birth to a baby girl and they lived happily together as one family. He is well educated and has a competitive streak. He thinks things through without letting his emotions cloud his judgment. He never experienced a failure in his life before but after getting married, he faces a huge setback that takes an emotional and personal toll on him.

Lee Geum, second daughter (actress Lee So-yeon)
Daughter of Bok Mi-ja. When she was 11, her mother married her current stepfather.
She gets along with Ki, who is younger than her, but she has a strained relationship with her sister, Hwang.
Though she was diagnosed with chronic myelogenous leukemia, she keeps working as a high school track coach to pay the medical bill of her biological father. She dates Koh Gyeong-woo, the son of the school director.

Koh Gyeong-woo (actor Shin Seong-rok)
With handsome looks, he wears the latest fashion trends. He is a smart guy who has a promising career producing TV shows at a major network. His early success has made him into a conceited person who thinks he is better than everyone else. Because he has no compassion nor hardly cares about the well-being of other people, he doesn’t treat Geum, who is stricken with a disease, any different from a healthy person even though he is aware that she is seriously ill. Somehow this endears him to Geum.

Lee Ki, last child (actor Jin Lee-han)
Last son of Lee Man-ae. After graduating from medical school, he quits his internship and starts taking acting classes to become a musical actor. He is a high achiever who always wants to be the best at whatever he does. He’s smart, athletic and has a well-rounded personality with a bright outlook on life.