Ok...now I must watch all the Japanese adaptations. I can't compare it to the Japanese version so this review is based only on this version. This is a really good psychological thriller. It is a very interesting plot. I wonder how many of us can lie convincingly. I have passed a lie detector test before. All the students in one of my college classes took one. Out of 27 students, me and this guy were the only ones that passed it even while lying. 27 students were told to lie while the other 27 were told to only tell the truth. I think it is strange, because I rarely lie and am known for my brutal honesty. Can you tell when a person is lying to you? I don't think I'm very good at it, but I also don't trust easily either. Wow. I love dramas that make me think. Lee Sang Yoon, Kim So Eun and Shin Sung Rok are great as the main leads Woo Jin, Da Jung and Do Yeong respectively. However, the character and actor I enjoyed the most is Lee El as Jamie. She was too much fun. The other actors were good too. The music is appropriate. This is definitely rewatchable. If you like psychological thrillers, then you will like this.