Looking for a Story

Hello everyone,

I've been trying to find a story for a few days, but I can't seem to tease it out with filters. It is about a man changing into a woman due to nanobots. Not long into the story, he applies to work in security at (I believe) Whateley Academy. The rest is a bit of a blur which is why I have been looking for the story; to fill in the gaps.

Thank you to anyone who can help!