Five couples had their own conflict in their relationship.

Lee Min Ho was engaged to Seo Woo and have many great plans together. But after they got engaged, Min Ho got busy with his on top business and forget about Seo Woo for a while. In the meantime, Cho Kyuhyun, the ex boyfriend of Seo Woo has appear after a long long time. Does Seo could maintain his relationship with Min Ho and not distract by Kyuhyun attention? Could them celebrate White Day together?

Jang Geun Seok is a freelance photographer who adore body language so much. He believe good things will emerge from many pictures he capture. After he met Soo Young, a very creative modern dancer, he seems more interest to take a very good angle of Seo's moves and knows her much. Geun Seok sees a lot of glory inside her dance moves. But what he gonna do when he finally find that Seo's personal life not as perfect as her dance moves?

Become a doctor is not an easy task. Deals with so many illness person sometimes not really a nice thing. But what happen with doctor Yonghwa is different. He get distracted by his car accident patient named Moon Chae Won. her charms from her face makes doctor Yonghwa couldn't say any word. Day by day he tried to get closer with this patient, and he even did not care when he found out that Moon Chae Won have much problem with her sight which can cause blindness. He try to deal with it until Chae Won's fiancee came up. What did he want exactly? and could Dr. Yonghwa celebrate his very first time White Day with the woman she finally found?

Park Shin Hye and Jung Il Woo already together for five years. Each and every one of them have their own personality. Shin Hye is a girl who is very tomboyish and spontanity, meanwhile Il Woo is a very serious and perfectionist one. Not many people can understand that kind of relationship but it such a miracle they can maintain a very good relationship until five years. But things change, especially when Il Woo and Shin Hye are no longer become High School member anymore. Il Woo made friends with some of top management at his office, and of course, with some of high ranks woman. Because of this changed, Il Woo then pushed Shin Hye to compensate him which means Shin Hye have to change her own identity and personality. Will Shin Hye able to do that even she doesn't really feel comfortable?

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