Help find bl

I think it was yaoi but I don't really remember the smut so I might be wrong
It was a manhwa I'm pretty sure it was korean
It's historical with fantasy elements
Humans live among this other kind that I don't remember the name but they're something like korean goblins colorful hair elemental powers something like that and they have a power hierarchy where the king is the strongest among them
MC(uke) had time traveled I think he was the "goblin" king companion but the king couldn't really understand human emotions and mc suffers a lot when he came back he tried teaching the king human morals and emotions when he meets him as a child(he ages really fast) it works kinda there's a fruit that allows mc to become pregnant and that's all I remember


There's also another bl that I recalled just now where mc is a celestial/heavenly being born among humans and he is found as a baby and ages really fast and the will go back to the heavens in 15 years I think but the emperor takes a liking to him but he hates celestial/heavenly beings(because his previous lover also left for the heavens i think the plot twist is that mc is his lover reborn)