This might be on the very fringe of this topic, to be completely honest, since it's not classical BL/romance, but if people want to read something different that takes a more historical approach you can give my works a try.
The 'romance' is set in these two guys getting brought together because one of them is haunted (the other being a rather unorthodox paranormal researcher). It's a slow burn, with them starting as strangers, while both trying to survive and to figure out what happened to this ghost. All this, to the background of the heavily divided social classes of 1860s Britain - since one is working class, and the other a Lord.
So yep, if you're still interested feel free to give it a go: