The thing about this drama is, every character is so fleshed out and the plot and character development is so well done and natural that it's believable. Like for example, if you watched the first two episodes and then skipped to the final couple episodes, the characters are SO drastically different that it's almost unbelievable, but the thing is that the writers did such a good job with this slow build that the characters' development is organic.
I'm absolutely in love with the story, it's about two broken souls finding healing and love through each other. It touched on topics that I'm not used to in kdrama.
Also WOW! Seo Yea-Ji and Kim Soo-Hyun are the most attractive and good-looking pair I've ever seen, their beauty is out of the world.