first to come to mind was Into The Rose Garden but too bad it's omegaverse (ml rightfully hated the mc for what he did)
but a non-omegaverse I know is Zetsubou ni Nake (manga) basically ML was sexually assaulted by MC and then yea some healing later on...
Palace of bardo ( rape/violence warning tho)
https://www.mangago.zone/read-manga/palace_of_bardo/
Bad friend (kinda but it's friends to enemies to lovers I think it had a little grieving to it)
https://www.mangago.zone/read-manga/bad_friend/
Steel under silk ( I doubt it's accurate to what you want, I don't remember if it really has grieving but there is angst and revenge plot)
https://www.mangago.zone/read-manga/the_blade_and_the_flower/
Meteor orbit
https://www.mangago.zone/read-manga/meteor_orbit/
Can anyone rec BL (not omegaverse though) where one character rightfully hates the guts of the other character and there’s an intense chasing and pining arc? Can be any length, ongoing or not, MC or ML can do either the hating or the pining doesn’t matter I just wanna see someone work for it