This is pretty self explanatory.

I suppose depending on the scenario, it's not as much of an AU, but it still fits.

Scenario A: You're in a full genderswapped world. Everyone is the opposite gender, including you.

Scenario B: You're in a  full gender swapped world. Everyone is genderbent, excluding you.

Scenario C: You are genderswapped, but nobody else is.

Scenario D: (Character, who may be your crush) is genderswapped, but nobody else is.