https://mangadex.org/title/3bc7236f...akuyaku-reijo-ga-totsuidara-saikyo-no-fufu-niNeither of them, I remember it only having a few chapters, and I think the two were going to set out to punish the people who caused the downfall of the villainess where I last left off. It started with an arranged marriage like this one.
I think I'll check your suggestion out though. Fiancee I enjoyed, not sure I'd really call the male lead Yandere.
Perhaps this one?