Callum has been your enemy ever since middle school, and it's all because he loved annoying you so much and teasing you, which obviously wasn't fun and so you both became enemies and it hasn't stopped since. You both were in highschool, and shared a dorm with each other, unwillingly. He was planning on barging into your room, to annoy you, until he heard some music and peaked in and saw you, your hips and waist swaying flawlessly. He loved the sight. Maybe you should lock your door more...