There are a few inconsistencies...
For one, certain characters die off screen even though you've grown attached to them. You're just told they're dead. But then you're told their spirit did something... That would normally have been done by another character that wasn't dead... Or maybe they were? They sort of vanished at some point with no explanation.
Additionally, the whole... First 60 ish chapters are about red lotus... Which doesn't get a conclusion. Read my spoiler below for clarification but, there is no conclusion to the main driving plot point.
Finally the very end of it, while sweet, wasn't satisfying. Many are dead and it seems like they'll never return or be replaced? He atoned for what seems to have been roughly 40-50 years going by the neices age and dialogue so how did such a short time make up for the terrible things? How do you even make up for what happened when so many died?
Spoilers critique below.
First to address the no conclusion. The last we see of red lotus and the royal family, they are using sorcery to try and kill ox and the emporer. Then yellow dragon shows up aaaaand picks up emporer aaaaand starts suffocating the animal spirits...
Are we supposed to assume that that killed red lotus (also a snake, and a sorceress) and the royal bloodline? Why not show that then? It's been SUCH a thing for the story for 60chps and they die with no show or mention of it? And if they didn't die, what happened then??
Another "wth happened" is black tortoise. Ok, he turned evil. Did they manage to kill him then? They were notified by pigeon stuff was going down (even tho rooster shouldn't have had knowledge of that AND time to write and send a message during it all) and yellow dragon was told... While black tortoise was alive. So did he slaughter him and return? Nothing is shown or mentioned or anything.
Same with black tortoises emporer. He was hinted at early on, he was set up to be this big thing, he was even hinted at seeing emporer face to face and possibly even trying to kill him himself but NONE of that happens and it just goes away never to be mentioned again.
And he even said he was there because emporer died so he threw himself off a cliff. How? How did that happen? Emporer was supposedly never dying and his deaths were being replaced with yellow. That was a MAJOR plot point. So which number died? 26 lived his whole life (and also was somehow 27 too) and 27 never died but black tortoises kingdom got messed up in between 26 and 27. Even lets say during 27. Either way, neither died. Both lived their entire lives and passed away on their deathbed. So how does any of that make any sense????
In the end, because there's so much going on (time travel, different worlds, different dimensions, dream realms) I think the author lost track of some of their story and as a result forgot to explain certain important events or just plain forgot they existed.
So it was a good read, and a nice love story, but the rest of the plot is going to be annoying if you take it seriously and try to follow everything going on. There's just too many missing pieces to be satisfied with any other part of the story other than the romance.