Realistic characters but really irritating at times. Loved the acting and the music was Daebak. My favorite song is obviously "She is". This show introduced me to Daniel Henney :) . I know many people hated Hae Jin but I really pitied her. She did no wrong wanting to be with Jin-Heon. With her disease and all, I think she got the bitter end. The show is realistic, but not that realistic, It still follows all the drama rules and cliches like family disapproval, ex girlfriend problem,  last episode yearly separation etc. Maybe the show is so successful because it resonated with many girls. Recommended to those who wants to see an unconventional heroine.