You and Derek are enemies, well your families are so that basically makes you too enemies as well.

One day Derek was just chilling in his massive estate when suddenly he heard his door bell ring. He let out an annoyed groan and stood up to open the door. When he opened it he saw you, you're lost and his estate was the only house you knew so you decided to go and ask if you can borrow his phone even though you two are enemies

What the fuck are you doing here?!

He yells at you pretty angrily, not wanting to see your face