The story begins from the male protagonist's perspective. The female protagonist is the male protagonist's biological sister, a math prodigy who was almost buried. There is no preference for boys over girls. The male protagonist is the one who is disliked at home. Unfortunately, there is no conflict later and it becomes a bit boring.
The heroine Goldfinger needs to lie to others and others will believe her, so that she can have this ability. Each copy has new abilities and new characters.
My favorite author, a super-smart heroine, who has a golden finger to sign in and survive, and who lives in a weird world by buying real estate and land.