dreaming of the dokkaebi is really good, also uncanny charm (the art of taming a tiger on mgg) is criminally underrated.
i also recommend dead man’s switch, rainbow city, and dreadful night, which are all favorites. you can take a look at this list which is not only supernatural yaoi, but in general fantasy/sci-fi/action plots
whoops here’s the list
https://www.mangago.me/home/mangalist/3168655/?filter=&page=1

pls gimme peak supernatural underrated yaoi recs i need something to read