Well, I've tried this before but wasn't really able to get into it, but I'd like to try it again. The story basis is simple.
My character has moved across the country to attend college. She's a freshman and is clueless when it comes to sex as she grew up with a strict set of parents. In fact, they wanted her to attend a college closer to home, but she refused. She arrives at the college and goes to her dorm room. Her room mate, is dom and from the moment she sees her, she wants her and will make her her pet even against Alice's wishes.
To get Alice to cooperate and not report her, she threatens her and Alice suffers in silence. Her only escape is her classes, until her room mate switches to them where the abuse (touching and groping even in class) continues. Her room mate's parents are well known and have donated much money to the college which is why even when witnessed, they faculty turns a blind eye.
I'm seeing this as non/con maybe borderline extreme. PM if interested.