Reading the overview & reviews I've expected that this would be a semi episodic drama where every couple of episodes an alter ego would be resolved. I thought it would be like a medical drama that that briefly touches upon some serious topics, with some romantic comedy added in, very much like what I've experienced in "It's Okay, That's Love". That's not it, the medical things are just fluff with no consequences, the FL does not do anything that a doctor should do with a mental patient. Despite this show being a fairly recent 2015 title it feels old, it's very much like a 2005 drama. It has several cliches that have been retired long ago, also at certain points in the drama I felt that it's overflowing with makjang. The second FL did not have a lot of screen time, but whenever she was on I found her character to be completely unnecessary and annoying. I like Park Sojoon as an actor, but oh my god his character was annoying me to no end, he portrayed a very oldschool second ML. The chaebol infighting wasn't interesting at all, even though this topic has been done to death, I've seen MUCH better written and more interesting iterations, both in older and newer dramas. There are also some serious problems with the pacing, there is a lot of filler in the first 17 episodes, the story becomes quite draggy in the middle. This could have been acceptable, but after all that time they only delivered a 10 minutes long happy ending & many of the story threads aren't really resolved in a satisfying way. (like what happens with mom, dad, second FL etc etc) The last 90 minutes are really rushed and I'm not entirely happy with the conclusion. I feel that there were some missed opportunities, imagine an alternate ending where Segi & Dohyon join hands to navigate both their personal & professional lives with great success. Also our villains were dealt with under a minute, it's not as bad as their entire family dying, because they get hit by a meteor, but it's a nearly as random of a conclusion to their story.

Despite all of the above this drama has some outstanding qualities. The main actors were an awesome pair, they've had good chemistry. I have liked Hwang Jongeum already and she did not disappoint. Ji Sung delivered some genuinely impressive acting, maybe the best acting I've seen in the alter ego genre thus far. If I look at the story as a romcom & ignore everything else then it is a very good romcom, there were some exceptionally funny moments. Even though many of the supporting characters were not very well written, the actors playing them were quite good, especially Kim SeulGi, it would be nice to see her as a main lead someday.
The OST is also a bit oldschool, but it's really good, especially the title track.

8/10 seems a bit too high of a rating, but I was entertained enough I suppose..