I started watching D-Day after seeing Kim Young Kwang act in Pinocchio. The previous and so far only medical K-drama I had seen was a huge disappointment which is why I didn't set my expectations too high. I'd say it was all thanks to both good pace of action and the actors' incredible chemistry that got me hooked almost right away. Kim Young Kwang's character was completely different from Pinocchio and for me it really seemed like Young Kwang was truly enjoying his character in D-Day. And don't even get me started with Jung So Min. I have a feeling I haven't fell in love with a woman character in this extent before. But the most important thing is the chemistry between the main lead which really shook me! The balance between action & suspense and humor is really good. The only thing that bothers me is (like with every single 20-episode-k-drama) that in the middle the plot started to drag, but from episode 1-8 and 16-20 the story and pace was on point. Also the soundtrack BLEW my mind: It was rather like watching a high budget movie than a drama. After finishing the drama I had to listen to every track from the OST and I still can't believe how good work the composers have done with it! Overall, after almost 6 months, D-day managed to be a K-drama that really got me hooked. It gave me hard time trying to focus on other things like school and even managed to make me cry which felt quite refreshing: For a long time dramas have tried real hard to make me emotional and haven't succeeded. D-day was a real savior and I motivated me to look for more thrilling and moving stories.