confusing
I think she has red hair and the main boy has black hair
She either recanated into the story or did and came back
I just remembered its a revenge manwa/manga
Oh. Ok
This one
Sorry it isn't this one the main girl has red hair
It's a historical manwa and as I can remember the main girl refused to marry the Prince and decided to marry a Duke instead and the mother inlaw wanted the Duke to marry someone. Sorry that's all I can remember ╮(￣▽￣)╭