First, the synopsis is not correct. The character of Na Ji Young is not a "rugged individualist". She suffered from depression, antisocial personality disorder, and probably a couple of other disorders. She was a mess, and she wasn't a nice person at all. Then you have Park Byeok Soo, who had problems of his own - he couldn't stand to be alone. So you've got her that can't love, and him that loves too much. This was a difficult watch for me because I wasn't able to relate to their personalities.
However, thankfully it was only two episodes so it didn't get mired down in filler that is so prevalent in Asian dramas.
The acting was good, and once they got together and opened up a little it became more enjoyable. This drama emphasized the damage that people that are supposed to love you can do. It also brought to light - is it better to have loved and lost or never to have loved at all? She didn't want to let anyone in because she was terrified of being hurt, yet her transition of putting herself out their to her co-workers reaped positive results. The photo montage toward the end of the show gave us a glimpse into their future lives. One amazingly hot kiss was a treat to see.
I felt that the woman playing the psychiatrist did a poor acting job. She was entirely too flippant to be dealing with other people's psyche. She could so some serious damage.
I can't totally recommend this drama, but due to the fact that it was short, I was glad I watched it.