As others said, story is a little streched out ..
For most of the story Choi Yeon Soo lacked character.
Ji Jin Hee was amazing.
Also the Father-sibling relationship in the Lee family nice ..
All in all, a great drama with a brilliant OST.

Lead Role chemistry was quite amazing during the first 10 episodes.
Suk-Gyu and his father's scenes were quite emotional.
Also a nice potrayal of a understanding family were the female lead is the main earner and Male lead takes care of the household.

Actors playing Do young chol and Im Ryung hak characters were pretty good.