Dressed in Medieval Clothes, I Was Mistaken for a Nobleman

Female-Oriented Stories Where the Protagonist Pretends to Be an Aristocrat or Powerful Figure, Without Acting Stupid or Being a Doormat

Looking for a book like Office Drone? Pfft, I'm a Billionaire Now! I once read a sci-fi story with two male leads. One of the male leads transmigrated into the body of a con artist, so he had to keep pretending to be one. But later on, most of the story was about romance. I want more of the con-artist act.