I didn't know about this drama until I saw the results of the polls 2018. This was so good. I love IU (actress or singer) and I couldn't imagine anyone who could portray Ji An better than her. Also I really liked Do Joon Young and Kwang Il, the actors portrayed their characters very well. The other characters made the story much better.
The music was gorgeous, even if they're not the type of music I listen. I liked the old songs from this drama, as well.
Now, I want to see more dramas which could give me the vibe this drama gave to me. I will surely rewatch this someday.