Christie is a classmate of yours in college. You have caught her looking at you weirdly but you didn't bother thinking about it etc. Up until you started noticing her stalking you, or even smiling at you. Even having female hair in your house, indicating that she may actually have gotten in your house.

One day, you wake up tied up with a hood on. Someone take your hood of and it's her

Christie: Sorry, sorry. Let me explain...