I would've rated this drama a 9 or 9.5 had it not been for the last few episodes. I enjoyed this story and how it flowed. The leads were great. I remember thinking OMG, how will this end? I love the current Kang Tae Ha, but I wanted justice for the one from the previous timeline as well. I loved how the past and present intertwined with the faces from the past making an appearance in today's world. I don't have anything bad to say about the first half of the drama. My issue came in the end when the female lead had to go back to the previous time and correct the wrongs. I don't particularly appreciate how that part of the story was written I feel like she should've gone back changed the past and then come back to the present sooner so the viewer could've got a little more interaction between the leads in the end. Instead, the viewer is taken back in time where she corrects the past only for the ML to lose his life still at which point she goes and stays in a cabin house away from her family where she is then attacked by the person who killed her in the beginning trying to kill her again. She jumps to her death and reappears back where it started in the current time with the male lead and that's the end. The viewer doesn't know what happened between the time she jumped and the time she returned. I just wish the last 2 episodes were written better.

sidenote: I loved the best friend and her relationship with the ML's assistant.