Why 10/10? This story has it all. I really love watching it.
Reason:-
1. The cast is really good. The acting was on spot. Ha gi chan and Jang eui soo made me love them through this. I know a little about acting but this drama made my feel stuffy during some points. It was great to see the chemistry of the actors

2- The plot line is so good that it even felt it was real.

3- The Ost actually defined the drama if you hear carefully. It was so nice that honey was dripping from my ears.

There are so many good points in this drama that I can't even describe properly. So I really recommend people to watch this. It is really wonderful. I am sure if you watch it once you would want to watch it again and again.
Lastly I want to thank you for bearing with me since english is not my first language.