I feel like this drama is underrated a lot. I didnt expect much but what i got was a nice catching tale about a really unlucky girl. Im not sure i can imagine how would i feel if i got into accident and woke up years later but i believe it would be devastating. This drama got one thing way better than many others - when i was watching and i saw some classic korea cliché shaping up i was like "oh man and now shes gonna do this and hes gonna do this" it actually usually turned out completely differently than i was expecting. Even though everyone cried a lot in the end obviously (its a korean drama after all), characters didnt do those overly stupid stuff like "i dont deserve you, you are too good and im a bad person, im gonna leave because of that" or something like that, this show didnt do any of this so that was really really refreshing. Characters were very good and especially Shin Hye Sun got the 17 years old girl in adult body on point and her acting was completely belieavable (and she is really really hot). Yang Se Jong was to my taste too cold at the beginning but i guess it was according to his character. It got better as the show went on. Overall - really good underrated show.