It'a about a limp girl getting married off to a duke..? (I forgot his title) then he treated her bad yadayada she fakes her own death and ran away. He cried at her grave for awhile and noticed there was accessories (she never wears it) so he knew that it was a fake body in that grave.
I remember the girl having white hair and ML was blond (?)
I feel like I'm speed running every chapter, like it's good by art and plot but the plot is too fast for it to make sense