Yoon Jung-ae: Starring Cha Hwa-yeon

After her husband's premature death, she has raised her four children all by herself. She considers her life as a successful one as she owns a shop, regardless of the poor neighborhood, with an attached living space. But her children, who had seemingly turned out well, start to cause her intense stress. They shirk their responsibility in caring for her and also scheme to have her remarry so they can get their hands on their inheritance sooner. Bitter and angered at their bad behavior, she announces that she will disown them and leaves the house.

Kim Yoon-hee: Starring Jang Seo-hee

As the eldest daughter, she advised her mom to start up a rice cake shop and believes that she is the true owner of her mom's shop. While she is a hardworking person she annoys people with cutting remarks. When she has problems in her life, she takes them head on and usually finds a solution. To protect the shop and house that is dearer to her than her own life, she makes a dirty deal with her younger brother, Kang-jae to make her mother remarry. One day, she meets her ex-lover whom she had a torrid romance with and her feelings for him are rekindled.

Kim Young-jae: Starring Kim Suk-hoon

Jung-ae's handsome and studious first son who currently works in the wealth management division of a large bank. When he was younger, he was a sickly child, which caused his mother a lot of worry. Because he knew his single mom was always struggling, he made an extra effort to be a good son all his life. He is not in favor of seeing his mother remarry but his wife and siblings overrule him and he tacitly agrees with their plan to help his mom find a new husband. Feeling that Chairman Uhm is taking away his mom, he treats him coldly.

Kim Kang-jae: Starring Lee Tae-sung

As the second son, Kang-jae always felt he was in competition with his older brother who was always ahead of him. In high school, he was on the varsity baseball team, but after his baseball dreams were crushed, he ended up committing petty crime and joining a gang. He rebelled against his mom who only doted on his older brother. He sets up an elaborate quick-rich real estate scheme with some partners but he ends up going to jail for it. His sister has to sell the shop to pay the lawyer's fees and his brother is on the brink of divorce because of what he has done. So he hits upon the idea that the only way to resolve everything is to have his mom remarry a rich man.

Kim Min-ji: Starring Choi Ye-sol

Studying in medical school, she is the pride of the family. As the youngest child, she was doted on.
Unbeknownst to her family though, she dropped out of medical school and goes to auditions to become an actress. Her family thinks that she is about to start her medical residency, but she is actually rehearsing for a TV role as a young doctor. She dreamed of becoming an actress since she was a young girl, but her mom and sister encouraged her to choose the medical profession because doctors made a lot of money. So she excelled in school and got into medical school. But during a class on dissection, she fainted after hearing the crack of the skull and seeing the innards spill out.