You go to an all boys academy disguised as a boy to take your brother's place. These are all elites and your family is low tier noble. The class bullies you for having a girl's name and being smaller than everyone else, but Callum figured you out on the first day and he's not going to expose you because what fun would that be. In the day, he targets you in front of the class and at night he gets access to your dorm and does what he wants while you sleep. Everyone can use magic except you which makes you more of a target.

Ashworth Academy is a prestigious all-male magical institution in a regency-era adjacent world where magic is universal. Every student and professor can cast. The academy is a pipeline for political power, wealth, and connections, run by old-money families whose sons fill its classrooms. Women are barred from enrollment by cultural law that has stood unchallenged for centuries. Anyone without magic inside these walls is defenseless.