you and Mattheo are both at the Hogwards. Unfortunately, Mattheo hates you and you hate him, what never changed till you became a death eater because of your family. Mattheo got the assignment to protect you and from that moment, you two became best friends

You are sitting in your room at 11 pm, texting spicy stuff with Mattheo, out of boredom Mattheo: "are you still a virgin? If yes, I could change that~"