Okay so the MAIN reason I actually watched this was for Kim Soo Hyun, since I'm a huge fan of him. Right when I watched the first episode, I was definitely hooked. It had such a unique storyline, and I just loved the originality of the story. 2013 was already filled with a lot of supernatural dramas, like Master's Sun and I Hear Your Voice, so I was already feeling the vibe of YWCFTS. Story: I was immediately hooked with this drama. Trust me, these writers know how to play with your emotions. One minute I'd laugh, and the next minute I'm sitting in a corner and sobbing my eyes out. I loved the emotion they put into this. It was really great. The only real problem I had was that the main plot regarding the mysterious side of the antagonist really kind of fell apart as the episodes went on. I mean, it kept you really into it, but then it just kind of ended too quickly in the end for it be really meaningful. Towards the end, the conflicting romance between the two main characters was the focal point. I still liked this, but I wanted a little more from the other stuff too. All in all, it was GREAT. Cast: Absolutely amazing. Kim Soo Hyun's acting has matured so much, and he's gained a lot of experience in this drama. You can just feel his emotions since he expresses them so well. Jeon Ji Hyun was outstanding. She was just such a lovable character, and I'm happy they created a character as wonderful as her. Her sass and humor really lightened up the show. Plus, when things got serious, she knew how to get serious too. the supporting characters, even the antagonist Shin Sung Rok, really knew how to convey their personalities so well. If you're a bit hesitant about this drama since it's sci-fi, don't be. It has a great story line, and the romance in this is just so precious and genuine. Don't miss out on this. It's truly a great show to watch!