OMG that story was painful to watch. While I like fantasy and scifi this was so badly written, I could not imagine how bad.
If you see your lover dying and go to the other world to save him, you will not fall in love with someone else out of nowhere. That was incredible unbelievable. You have a sickness while somewhere on the ass of the world (means a small town somewhere in the jungle) and there is one book which describes where to find a cure. Of course there are berries nearby in the jungle and they could not find a stick long enough to collect more than one berry. But two berries heal you anyways, incredible.

This show is soooooo overrated because they had a lot of nc scenes which was fan-service at his best. They could have expanded on the story of the side-couple which was much more believable but of course they didn't.

So while the production value was high, the fan-service over the top, the story was really terrible. And everyone who says you should watch it, they lie.