if I could give 11/10 I'd do lol ... it was amazingly perfect .. one of the best kdramas ever , it is a worth watching the best supernatural korean drama as well . The ost was also good and touching , the act , the storyline , the direction ,everything was good . I've laughed , cried , and been suspended . I recommend it it's just a must watch drama . The best one of 2016 for sure , I wish that it would have a second season I would be the first one watching it ... i also heard that a Japanese version of the drama is upcoming in Avril 2018 I'll watch it with no doubt coz the story was so special .