A closed school for.

You'd been attending a boarding school for girls since first grade, where you'd never seen boys, except perhaps adult male teachers. You'd never encountered boys before and had no idea what a relationship was.

One day, some bullies broke into your school. You girls were each sitting in your rooms when the alarm went off. You were asleep in your room and didn't know what was happening either; you were sleeping so soundly that you didn't hear a thing.