Before I write this review, I have read some other negative reviews and I respect their opinions about this series. But for me, maybe you just expect it to be like the other series that you've already watched for example like The King: Eternal Monarch. Time travel is different from parallel universe and this time its like that they were both intertwine that's why its so confusing. But however, when you finished the last episode, everything's will be understand. The propechy is what the story make a twist and confusing since whoever wrote it maybe from another time and dimension. The story is good and the culprit is also interesting. But I must say that the ending is not good. But the series is worth watching!