This Is such a good funny yet sad story.  The two main actors are superb and. D.O from exo has really emerged as an upcoming new actor.  Jo jung suk is a veteran and the two acting as half brothers did great. Big bro had foul language through out and it rubbed off on doo young. He started off annoying in the beginning and it changed to being funny then sad in the end. Park shin hye was a great addition to the cast though she had somewhat minor role. Another person that brought laughter is the unemployed nemesis turned friend.. Great show i watched twice