Air's manga / #orphan(32)

FL is in debt. Isekai'd from another world into the body of a spoiled count daughter. Parents love her so much they are willing to be in debt for their daughter's luxury. Now that FL isekai'd she decides to claim the reward money for finding the dukes nephew who was lost after a carriage accident. The parents are dead and the duke is looking for him. Duke provides a truth serum to the child in case the parent use magic to make the child have the right characteristics of the right child. Black hair and red eyes. The child has amnesia and doesn't remember the accident and is getting attached to FL. Child also has slight PTSD in drowning and loves stars. The duke ran out of potion and is forcing the FL and the child to live in his estate for 1 month until he can prove the child is real. https://tkor.date/%EB%82%A8%EC%A3%BC%EB%A5%BC-%EC%A3%BC%EC%9B%A0%EB%8D%94%EB%8B%88-%EB%82%A8%ED%8E%B8%EC%9D%B4-%EC%83%9D%EA%B2%A8%EB%B2%84%EB%A0%B8%EB%8B%A4

Drop the world's hero, blessed by gods to kill the demon king, was being manipulated by the clergy and finally died by his hand after her mission. Reincarnated into an orphan at an orphanage with memories intact, she is a genius magic user and met with the count (husband of duchess) and brought home. Duchess (mom) turns out to be old friend from the past life. plan to get revenge and live as dia the youngest in the new family.