FL discover in a book that she have been reincarnated in a novel and her bro is going to kill her cuz they're not related by blood so she decided to leave him with the OG MC but she's also a reincarnation and the world is trying to kill her.
It neither funny nor dark, and even though there's still no romance FL is being weird about the bro as she's trying to set him up with MC.
The Villain's Older Sister Suffers Again Today