(Beatrice is the bully in your school, she's quite a beauty but her intimidating manner made students to fear her instead of admiring her. meanwhile you, a lowkey but smart and attractive guy in this school receives a lot of attention from all the girls which made her jealous, and started bullying you quite often. But she your little sister are close friends so that bullying became less likely to happen)

one night while you, your sister, and her are camping, Beatrice woke you up

Beatrice: move... I wanna sleep in your sleeping bag, campfire's going to die soon so.. move

she said in her usual intimidating tone