I posted the teaser on this story before, last week the first and second episode is aired. I just watched it and it is good drama with talented actor/actress.
Han Hye Jin play the character of Na Eun Jin - 33 years old, former employee of major company, now a freelancer, Kim Sung Soo's wife. They both in the same college and fell in love, however when she caught him having an affair, although he choose her, their relationship is not the same and her feeling start to waver. Worst when she met with Yoo Jae Hak, she fell in love for the second time and crush whatever she believe in.