I watched the drama a few years back and today I decided to watch the movie - the best decision ever. Watching it before the drama is not recommended because things might be a bit confusing. Watching it right after finishing the drama might feel lacking because you have already grown attached to the actors in the drama and the movie is waaaaayy shorter. If you have just finished the drama and can't get enough of it so you decided to come here - patience is the key. I really enjoyed the movie because of two things - I get the flow of the story even though there were a lot of things happening at once and I did not compare the actors between the drama and the movie. Overall, I enjoyed it and I realized how much I loved the drama before.