I want to give a nice score to this story, I think it is something original and I was not bored in any episode indeed I was curious to know what would happen!
The history of reincarnation is interesting and the parallels between previous and present life are convincing and well made.
All this I think is a good point to see the drama, if you already know and love even one of the protagonists then I think it's really worth seeing it!

The problem is perhaps in how the characters were written .. especially the main ones, there was more than one absurd, meaningless, incomprehensible scene that only brought misunderstandings and chaos and also to see badly the female protagonist who bored me more than once and I'm sorry because she is a good and talented actress.

I don't know if there is really any connection with the book being quoted "Wuthering Heights" but I started reading it out of pure curiosity.

Spoiler

The last episode left me perplexed .. in reality I didn't expect some things .. it is as if the two male characters had exchanged roles as a result of the feelings of Sa Bin.. and everything that happened before, disappeared.. and the message that is given is not understandable.

- we can speak of unconditional love: Jong Bum is accused and labeled as a murderer, who has no feelings, evil; it was not like that but he does nothing to avoid it. Everyone thinks badly of him and he accepts it. Sa Bin goes beyond all this and decides not to leave him alone. With her sweetness she helps Jong Bum not to fall into evil and try to make him live a normal life. But he doesn't even deserve the name of a good boy, he wanted to kill the prosecutor Kim and above all he was a stalker!

- does it mean that eternal love doesn't exist ?: the love story of Hyung Bin and Ha Eun was beautiful. At first it seemed (they made us believe) that they had reincarnated to continue their broken love story in this life! She seemed in love, she declares herself and when she finds out that Soo Hyuk was getting married she almost fell into total despair, when they could start a new love story she starts to walk away and afterwards she discovered that she loved who killed her boyfriend in the previous life in front of his eyes.. and after saying that she loved him forever also in another life!
Although Kim Soo Hyuk didn't always do well, he shot Jong Bum in the head without too many compliments and was obsessed thinking that Jong Bum was a killer, I don't understand how they decided to change Sa Bin's feelings in the last two episodes .. no sense, she proved inconsistent and her actions meaningless.
I also thought that the attention not given to Ji Chul has decided to give it to Jong Bum. but it seems more like a charitable action for not to leave him alone, instead of for love.

I don't know if I haven't grasped the message well or if in reality there is no real message .. anyway the drama is beautiful. it is better not to stress to understand the actions of the characters and to look at him calmly for pure pleasure.

Thanks for reading my review and sorry my english is not very good.