Historical smut manhuas, bl or gl is good. But I'm specifically looking for GLs!
Moonlight garden! it was one of my faaaav! and i think ir fits your description pretty well.
https://www.mangago.me/read-manga/moonlight_garden_kang_unnie/
Curse Mingwa for making a bad plot manhwa, with a good artstyle!!!! This is physical and psychological torture, I been dropped this