I usually don't give 5 star rating, BUT this drama is an absolute 5 star. K-drama these days are kind of boring because of the same old plot and story, but I personally think this drama is one of the best. The plot is not too fast/too slow, and the actors/actresses acting is very good, they slowly developed this kind of emotion/chemistry with the viewers, so the viewers could also feel their exact emotion that they are feeling.