Sisters Ji-soo and Ji-yeong decided to sell their used underwear due to financial difficulties. Perverted men offer to buy them at a higher price by asking these two sisters for shots of them wearing the underwear. Other men offer to pay even higher prices by demanding sex out of greater desire. As the sisters earn more money than expected, their service becomes more and more popular.

Jennifer and Meg Swift are two sisters who are very close despite living far apart. Jennifer is in Salt Lake City, running a successful restaurant she started with her late husband and raising her teenaged son Simon, Meg stayed in their hometown of Hazelwood, helping their parents run the local bakery.

Jennifer and Meg Swift are two sisters who are very close despite living far apart. Jennifer is in Salt Lake City, running a successful restaurant she started with her late husband and raising her teenaged son Simon, Meg stayed in their hometown of Hazelwood, helping their parents run the local bakery.

When sisters Helena and Rachel are fed up with their love and work life, they agree to swap homes for 2 weeks to take a break. Yet what starts out as a relaxing holiday grows into a whole new perspective on their careers, life and most importantly, romance.

Hee-soo goes to her ‘rich lover Seok-ho’ while her husbands is on a business trip. Her younger brother Hee-yeong and her husband Jeong-tae are also together. Hee-soo introduces Seok-heo to Hee-yeong and Jeong-tae, and Seok-ho falls in love with Hee-yeoung at first sight. As Seok-ho tries to avoid Hee-soo’s eyes, and meet with Hee-yeong’s eyes instead, he decides to take advantage of Jeong-tae. Jeong-tae who dreamed of having sex with Hee-soo, seduces her, and while Hee-soo and Jeong-tae were playing, Seok-ho wins and took Hee-yeong as price. These people who are complicatedly intertwined, are at a crossroads to choose whether to disperse or become a new family.

Identical twins Kate and Chris Lockhart plot to be the other sister – at Kate’s office and Chris’ school – and take on planning their sister’s Christmas events. One rule, though: no romance.