This drama is almost perfect in every aspect. Story: the story is done in several films and japanese dramas before however this one topped them all for me. New elements where added that made me more emotionally attached to this drama. I will not explain the story.... to avoid any spoilers (u can read summary above) however; i should say i didnt give story 10/10 due to the ending even so the ending was ok but it wasnt the perfect one for me; i wanted or wished that they executed a better ending. Acting: Jo In Sung and Song Hye Kyo (main roles) are almost the perfect match ; never i was rooting or emotionally attached to drama couple like this before. They were flawless in every seen together; the chemistry was over the top. The sad scenes where acted perfectly which made me shed couple tears. the idea of forbidden love was also been acted so well. music: if u ask me what i like most about this drama i will tell u scenes when main roles together with music at the background. Yes YES the music was for me the single best thing in this show and it all summarized in one word THE ONE . thank u THE ONE for doing the 2nd best ost in korean drama for me Rewatch value; iam not big fan of rewatching but i rewatched some episodes again which mean that this drama has impacted me also i watched some youtube videos about this drama Overall it 9 from 10 and it almost got 10 but the ending was mainly the cause if u ask me its A MUST TO WATCH DRAMA