I was prepared for this to be one of my fav fantasy dramas but unfortunately it didn't come through. I was very excited at the beginning because it seemed like it could be a complex plot with complex characters. However, most of the characters are for-lack-of-better-word one dimensional. Ok Eul-Tae, although the villain, was set out to be my fav character/antagonist but the last episode gave him the simplest backstory. Throughout the drama we can even feel sympathy for him but at the end it was all for nothing. There was a lot that was underdeveloped or just not explained.
* The ending makes no sense if Bulgasals are unable to reincarnate. This drama didn't need an open ending, it deserved a proper conclusion.
* Siho's powers meant almost nothing. There was no explanation as to why she even has them & when she used it, it didn't give any big revelations.
* I don't understand why Eul-Tae would get hurt when he tried to harm Sang-Un when logically speaking if him and Hwal are Bulgasals, it should be them who are connected.
* No explanation was provided as to who Bulgasals really are and where they come from?? Ms. Lee had had mentioned they were originally protectors but who even appointed them as that + it didn't even look like they were really doing that.
* Hwal had no personality trait besides being a Bulgasal obsessed with revenge.
* I love family especially found family tropes but this was so messy lol
* I'm a bit confused on when Hwal stopped having feelings for Siho and started liking Sang-Un
But nevertheless this wasn't a terrible drama. I actually enjoyed watching it and reading the theories people came up with. I'll be honest if the viewers had written the drama, it could've been much better because some of the theories made the story much more complex than what it really was. There's quite a few things I would change lol but I did enjoy it. If you're able to overlook underdeveloped elements then you too will enjoy this drama and should give it a try !

(I'm still a bit conflicted on how I should rate this lol my critical side is fighting against the part of me that just wants to rate based off enjoyment.)

EDIT] Sang-Un was supposed to have been on her last life so she also should not have been able to reincarnate. Unless I missed something, neither Sang-Un nor Hwal should’ve reincarnated and crossed paths again. Honestly I think the writer threw that in last minute to appease viewers but I think the show would’ve been just fine without a romance plot line.