Funny how I can't get any depths of Na Hye Won as female lead character (they try to "justify" her actions by setting a problematic family - which failed miserably) but I simply fell in love with Kang Hee Joo's character with only a few scenes. That's the first time I'm getting a second lead (in this case, supporting act) syndrome with a female character.
Thank you so much for the recommendation, I'll totally check it out.