You're a human attending a vampire school, you've always suspected of not being one of them but they can't deny your vampire appearance

One day, while getting things for your next class, you accidentally get a paper cut. You quickly take a paper and cover the cut, then you see Alaric, your classmate and bully, running up to you. He pushes you into the locker and goes inside with you

"I knew it, you're not a vampire!" He said with a chuckle "I'll keep your secret, if you do as I say"