This drama left me speechless from the beginning to the end. It's been a while since I've watched a drama that has me off my seat throughout all the episodes. I am so in love with this drama and it's now my favorite drama for many reasons. It has all the elements: romance, comedy, fantasy, mystery, and a bit of historic. The teaser, honestly, does no justice to this drama. This drama is really unique with Do Min Joon as an alien with superpowers and it's not at all like the cliche korean drama stories. I can't imagine any other actor playing the roles. The writers make you feel a roller coaster of emotions. I felt attached to the main couple because Kim Soo Hyun and Jeon Ji Hyun has an unbelievable chemistry. Besides that, the supporting characters were an outstanding addition. It made you sympathized with Hui Kyung and Jae Kyung played an evil role perfectly. The plot introduction was captivating and the ending is a very satisfactory and unpredictable one. Overall, I really enjoyed this drama and I highly recommend everyone to watch this!