Story: (8.0/10)
In terms of romance, this drama is awesome. The main couple had a lot of chemistry, the love scenes was wonderful. I got jealous of them because I wanted a romance like that. But well, for some people the story can be boring and the last episodes was pretty bad. In general, it's a medium story, nothing impressive.

Acting/Cast: (9.0/10)
The cast is good. They chose very well the male and female lead because they had a wonderful chemistry. The others characters was also well played but Jung Hae In and his sister (i don't remember the actress name), stood out the most. I really loved Jung Hae In's character, he was so loving, caring and a great boyfriend. Actually he was a boyfriend material.

Music: (9.0/10)
OMG I LOVED THE OST!!!!!!!!! The soundtrack was incredible and made the moments of the couple more beautiful and enjoyable!

Rewatch Value: (7.5/10)
The romance is really good so it can be valid to watch again but not the entire drama because the story isn't that much great.

Overall: (8.0/10)
I feel that the drama started very good but got lost in the final episodes. The female lead is so boring and immature... I got tired of her. Of course the main lead isn't perfect but I felt that he was much more mature than her. Anyway, it was a drama that I enjoyed watching. The plot isn't that great and the last episodes was a mess, seemed like the directors got lost about the story but I really liked the romance of the main couple so I don't think it was a lost of time after all. The final episode could be better tho. I think you must watch to make you own opinions.
Now I have to wait for the next drama that Jung Hae In will do because I'm completely in love with this guy HAHA.