I absolutely love their chemistry. They are no doubt my favorite Drama couple. This is the third time they worked together and I am so happy to see them have kids this time around. Its like I've seen them from from being young lovers to now a full-fledged TV family - From Ms. Kim's Million Dollar Quest - I Have A Lover - and now Undercover. I can't wait for their next project together. Cheer to the 2 Actors!