There are many possible plots. For example, in a superhero - themed crossdressing fanfiction, a male superhero might crossdress as a female to deceive his arch - nemesis who has a weakness for beautiful women. This would involve him using his new appearance to get closer to the villain and ultimately defeat him. In a fairytale - inspired plot, a prince could crossdress as a peasant girl to escape an arranged marriage and in the process, he meets a commoner who he falls in love with. Another plot could be in a post - apocalyptic world where a female survivor crossdresses as a male to seem more intimidating in a world full of dangerous gangs.
Sure. A common plot is that of a young man who, in order to inherit his grandmother's fortune, has to live as a woman for a certain period of time according to her will. This leads to all sorts of comical and heart - warming situations as he adjusts to his new lifestyle in the crossdressing fanfiction. Another plot could be in a detective story where a female detective crossdresses as a male to go undercover in a male - only criminal organization. She then has to deal with the challenges of maintaining her cover while solving the case. And then there's the plot where a character crossdresses to attend a masquerade ball and ends up falling in love with someone who doesn't know their true gender at first.
One example could be a high school setting where a shy male student crossdresses as a female to join the all - female drama club because he has a passion for acting but the boys' drama club has been disbanded. Another is in a historical fanfic where a female knight crossdresses as a male to fight in a war since women are not allowed on the battlefield. A third example might be in a science - fiction story where an alien character crossdresses to blend in with a new species they are studying on a different planet.