Jae-young and Da-jin have been going out for 6 years. Living next door, their sex is not so hot as before but they know everything about each other. Da Jin is enjoying a lucrative career as a successful editor of a large publishing company. Always attracting people with his irresistible charm, home-shopping network producer Jae Young is also at the top of his game. One day, a fresh young girl approaches to Jae-young while Da-jin encounters a charming man through work that she shares a lot in common with herself. When these new people bring fresh air to their lives, their six-year relationship starts to shake down...