Manhwa with black haired female lead who died and came back

Okay, all I remember from this one is that the og girl was hated for some reason? She died, I think falling from a cliff maybe, then "something" came back in her body, and she goes back home and starts protecting the male lead, while also acting slightly weird. The ml might have white hair, but I might also be tripping on that part. She's like super strong.