isekai

FL is reincarnated into a villainess (who totally didn't deserve what she went through) and decides to leave her abusive family, end her engagement, and become a commoner. She opens up a stationary store for kids with the help of an 1,000 year old sword guy.

FL is unapologetically a villainess but is nearly killed by her evil "family". Before she died she drank a potion that was supposed to take he back in time but instead made her a kid. She meets the duke who hated adult her but for some reason he likes kid her (pedo vibes but whatever).

FL is falsely accused of trying to poison her little sister (who is a little skank bitch) out of jealousy. She is beheaded and reincarnates the princess of the neighboring kingdom. She is loved very much by her family and is gifted with the ability to see and summon spirits.

FL is sent back to the past and is determined to leave her cold (but very hot) husband and mother in laws behind. She approaches an "impotent" duke and proposes they get married. She makes the point that because her and her current husband didn't consummate the marriage, it wasn't technically valid. After some convincing, he agreed and they have an extravagant wedding. On the wedding night, she finds out he most definitely is not impotent.

FL is from a fallen aristocrat family and responsible for taking care of her siblings. The duke is weak and sickly (and a fucking asshole sometimes) so his mom (also an asshole) asks FL (who's family is known for being fertile) to marry the duke in exchange for giving money to her siblings. After two years, the FL remembers her past life where she was executed for poisoning the duke. So she decides to do everything she can to make the duke healthy again so the dukes mom will void the con

FL is the neglected daughter of the emperor. In a past life she dies (for complicated reasons i don't feel like explaining). There is a fake princess (who thank god everyone knows is fake) who is adored by the emperor even though she's super annoying. FL is trying to get away from the palace by making everyone hate her but ends up making them like her more. I like this story because everyone, including the emperor, starts treating her better pretty soon in to the story.

FL is reincarnated after being murdered by her family and husband. In order to avoid the same path, she approaches the scary duke and proposes. He declines immediately, but shit happens and FL ends up dying again. She wakes up half buried and turns out the dukes family has a curse where when interacting with their blood it can be deadly. FL is the only person immune to their poisonous blood so the duke agrees to marry her. Bonus points for the cute kid.