Immature is the word that comes to my mind when i watched this show.

Characters were not developed /established well. Not the ML/FL or her friend or anybody. Chemistry might be good but i would prefer that emotion development between them any day than any no.of steamy kisses. But here ML keeps disturbing FL and one act of his melts the FL. I guess the same scenes would still work but with better screenplay or something? It felt like there is no connection between scenees. I know its 2009 series but there are dramas around that era which had good flow.
But big disappointment is the character arc of both FL and ML. Fl started strong and no nonsense but just becomes a senti self sacrificing woman . Her goal of getting into civil service is forgotten. Same with ML. Them handling brain tumor is just so absurd. One day he is running around like mad and next day he sleeps with FL and he has accepted it!

Acting : FL was tolerable but MLs acting is just bad (sorry no offence if he is one of the famous actors) and his scenes were just too jerky running around till the last scene. His reaction when he comes to know his son is missing in the last epi is one such example.

I had expected even if there is misunderstanding till last epi there is that maturity in the story , the feelings etc but was disappointed.
PS : Music is horrible with no relation to whatsoever happening in the drama.