From the poster it seems like kwang soo and seung Yeon have a close Ill fated relationship than the other four. so they're the clinic owner and girlfriend.
not a drama you watch while airing... gotta wait till it ends
why not? from the trailers it definitely looks intense and engaging but yeah for business drama it's hard for people to get hooked from the get go they'll have to stay for 2-4 eps to enjoy it.