No doubt the main couple is very well chosen, and are very good and nice actors. And the series was quite enjoyable until the beginning of episode 24. After that it becomes really heavy, as if the writter had pulled all the string of its imagination downwards to prolong the show to some 40 episodes. The series then plunges into the madness of some of the most wicked characters, masochist or serial killer, so vicious it becomes simply sordid to depict as well as to watch them, a kind of unhealthy voyeurism into the disturbed physche of some dangerous psychopath, definitely not my cup of Chinese tea/series. I am quite sad that because of the leading pretty faces, most viewers did not discern some things were going too far, but it is their problem after all.
Having jumped prematurely to the end of the series to check it would not be an irreparable disapointment, I found out the torture did not stop there, and I decided to resume the flow only up to the last happy images of the last episode for the main couple. For after that we are left on this kind of very 'refined' double interpretation enigma, typicall of those 'lofty' series which refuses to give a frank happy ending because it is so called artistically cheap, even if the viewer/client loves it but will anyway be left frustrated.