i found this funny.
Han Ji Soo: You really good with your sister.
Goo Dong Baek: it's bcos i'm the one who raised her.i do all the mother and the father's work.except breastfeeding.
Han Ji Soo:
Goo Dong Baek: what? did i say something weird?
the conversation is funny.to tell you the truth.
IF you watch the drama.cos that Goo Dong Baek is a naive and straight guy.
and to know that he doesn't even think he's saying something funny is laugh.