Yoon Ye Eun has been married for 7 years. She is a housewife and works hard taking care of the family on her husband's side. Her in-laws though give her a hard time, but she is positive and happy. Her husband's business is doing well and they move into a new house. Yoon Ye Eun then finds out her husband is having an affair.
Yoon Sang Eun is single and runs asmall piano institute. While running her piano institute, she has fallen into debt. She meets Choi Jae Woong through a matchmaking agency. Choi Jae Woong proposes to enter into a contract marriage with Yoon Sang Eun and in return he will pay off her debts.
- Native title: 해피 시스터즈
- Also Known as: Haepi Siseuteozeu
- Genres: Melodrama