(credits to the owner of this prompt)

You and harry have been at each other's throats since 1st year. Why? You were one of the friends of draco and being (insert house)

It was yule ball and some guy approached you. He suddenly started to flirt with you and ask you questions that made you uncomfortable.

Suddenly, you felt an arm wrap around your waist, pulling you closer.

"Back off, shes mine." Harry said, his grip tightened.