Its so easy to give this drama a high rating. Speaking of a unique, new & fresh story. It was well-written and well-executed by the actors. Since I have been watching kdramas for many years now, I guess it gets a little boring when stories sometimes were just recycled and give you same old story so I'm a sucker of a drama that is a breath of fresh air. At first, I have a lot of confusion maybe because I don't have any medical background so I don't expect myself to understand all these medical conditions but as you go along every episode, it all make sense and it all come together that you'll tell yourself: "Ah, that's why." That makes the writer a genius. To be able to make the viewers understand something that is unfamiliar and make them relate to it is pure genius. The actors were the best. I love them all. Gong Hyu Jin has made it to one of my all time favorite female celebs. Talking about chemistry, this two makes all the actors and couples a run of their money. So natural, so realistic you'd think they're a real couple. They are just the real deal. IF they have another drama together, I will definitely won't think twice. The best part of the story ~ the end. You won't ask for a better ending of this story. Just simple but it was fit perfect.