This show was a 10/10 for me until somewhere in episode 11 or 12, then something just totally derailed in the story. The acting for this show was amazing and het main characters have amazing chemistry. Everything was smooth sailing and the story was on its way to become one of, if not my favorite kdrama of all time. I really liked the main song used in the series, maybe because I have not heard Last Dance of Wu Bai before. I have not watched the original, so I do not know if the story ends exactly the same, however the ending just feels rushed, like the writers didn't know how to continue the story, and therefore magically fix some stuff, and leave everything unexplained.

Now for the explanation about what I disliked, Warning spoilers ahead!!!
For me it all went wrong when Kwon Min Ju started taking over, and left Han Jun hee in her head. Don't get me wrong I am all for some character development for Kwon Min Ju, as it felt kinda unfair that Jun hee got everything that Min Ju wanted. However the way it was handled was poor at best. At first she is really stubborn, but when Jun Hee takes over again, she is like allright maybe I do not want to kill myself, because suddenly Jun Hee "understood her". Instead of this ending I would have liked if there were more time travel attempts, instead of the final one were Jun hee suddenly gets back in 1998 right at the moment of the accident after praying to the lord that is Nam Si Heon. They should have realised Jung In Gyu was the answer for Min Ju's sadness and attempted to get them together, like Si Heon tried from the very start before the time travel interference. However in the current storyline this is not possible as everyone is dead and only Jun Hee can do something, but she can only watch. Maybe they should have had Si Heon time travel again to Jun Hee instead of the random prayer bullshit at the end, and somehow fix it. I am not opposed to them finally destroying the tape. But the reunion in the new timeline also is underwhelming. All the memories are gone, but somehow they just feel that they belong together. I get it they averted the crisis and got their happy ending, but come on at least give some subtle hints. Show the new timeline where Min Ju, In Gyu, Jun Hee and Si Heon are all happy and maybe even friends. What has happened to Oh Chan Yeong, is he in jail like he should be, or is he out there killing other people? What about the uncle, did he become a barista? The final episode had all those little problems which made the conclusion not counteract all the suspense and sadness we went through to get there. Sorry if this is more like a rant, but I just had such high hopes, and the end was an enormous let down.