This drama had a great premise and was nearly perfect throughout. It was funny, romantic, and full of all those crazy emotions that come with having a heart. I was worried about how Gong Yoo was going to pull off acting like a 18 year old without it being over the top but I have to say he was fantastic and to me the highlight of the show. Then you get to the ending....and you go "Huh? What? Where are the answers to all the questions that have build up since the beginning?" Hong sister's you have butchered a potentially epic story. Maybe if there was 20 episodes instead of 16 the ending would have been better...we'll never know.