Park Han Byul and Park Kwang Hyun star in this bubbly drama about a committed couple who realize they might not belong together at all. Jeong Seok and Yeo Kyung have been dating for years. Jeong Seok is uncultured and poor, while Yeo Kyung is polished and rich. They both begin to feel dissatisfied, and then they both meet someone else. Can true love overcome habit?