Definitely my favourite drama of all time ! I started watch this because of Ji Sung, but in the end, all the casting is so talented, they put emotions on every scene, like reality. The alchemy between the two leads, is growing slowly, making the show more realistic by their sentiments. There is something about Ji Sung's acting that is just like dream, he is so professional and totally immersed in his role, it's so wonderful to watch. I only disliked some little error about medicine's basics like putting ALL your hair under a cotton hat for operation. But in the end, I do not mind that because it's a serie. The plot is very interesting and refreshing so I was not annoyed even for a second while watching this, the waiting for update on episode seemed like eternity lol. I highly recommend you to watch this with tissues because you will surely cry.