Valid Love

Jang Hee Tae (Uhm Tae Woong) met his future wife, Kim Il Ri (Lee Si Young) when he worked as a temporary biology teacher at an all girls high school. Il Ri was a student there.

Now, Hee Tae works as a fishery researcher and spends his days in a typical marriage. One day, he learns that his wife is having an affair with a carpenter, Kim Joon (Lee Soo Hyuk). He becomes angry for the first time, but decides to keep his family and wife.