https://www.mangago.zone/read-manga/doku_wo_kurawaba_sara_made/
I've been reading this over and over again since the day I found it, it's really good with all kind of plot you would ever think about
Ok! These aren't romantic, but still really good reads. They do have a lot of gruesome parts tho.
https://www.mangago.zone/read-manga/maria_no_danzai/
https://www.mangago.zone/read-manga/brutal_satsujin_kansatsukan_no_kokuhaku/
This one is romance (I think)
https://www.mangago.zone/read-manga/koisuru_psycho_no_shirayuki_kun/
does anyone have any recs for revenge trope? doesn't matter if it's modern time or historical