isekai/reincarnation/past life/historical manhwas that feature mean who regret their actions and suffer

She’s using him to avoid getting married to someone else. He’s this total fuckboy. But their character development is great. Not to mention, it is also pretty realistic. He’s not the kind of ML that changes overnight because of the FL. It’s a good slow burn.

I normally find shitty male lead’s suffering to be satisfying cause those mf’s had it coming, but not this one, his struggle was a lot more than the whole “why won’t she look look at me :(&l