I just finished watching this drama, and I already miss it! I can't believe how long it took me to finally decide to watch it! I should have seen it sooner! That is my only regret. At first I was kind of sceptical about this drama, not knowing what to think of a horror and supernatural korean drama, thinking it wouldn't be as great as it appeared to be... I was so wrong. I could not have enjoyed it any more. It had everything, from good comedy to almost horror (I really got the creeps in some scenes) with a really touching (though frustrating at times) romance. First, I absolutely loved the story : it had a mysterious overall plot that left you on your toes for most of the drama (more mysterious than I first thought), while also adding short plots that changed every episode, and they were interesting and greatly contributed to the progress between the two leads and were in no way unnecessary to the show. The romance in this show wasn't awkward at all, it was a proper fall in love over time and not at-first-sight kind of romance. It left much more room for the comedy and the mystery. I found myself really looking forward to the next episode, squirming with delight when something good happened, and it brought tears to my eyes when something sad happened. The good thing with this story is also that, you also create a connection with all the other characters, event the cameos (the short-plots), the show left plenty of room for the small roles to poke at our feelings and move us just as the leads do (or maybe I'm just an emotional wreck). Overall, this story had good progression, fulfilled it's duty to make us laugh, cry, dream, and also scare us (seriously, not kidding, they did a great job with those special effects, because I was affected ^^). Great plot! When it comes to the acting, it was absolutely great! So Ji Sub and Gong Hyo Jin had am-a-sing chemistry, I really want to see them in another drama together. The acting was very good, and I think this drama is underrated acting-wise (story-wise too), I think it deserved many more awards than it actually got. I really want to applaud Gong Hyo Jin and So Ji Sub, just excellent! I would not change anything about the cast! For the music, I fell in love with a few songs, not all of them, but it was a pretty good OST, that I probably will still be humming in a few months time. For the re-watch value... definitely! There would be less suspense, but the cute relationship and great comedy and story are worth every minute! I would definitely re-watch! Overall, I highly recommend this drama, to anyone (though I'm sure not everybody would agree with me) and I am still kicking myself about not starting it sooner. So watch it now!