you are a Vampire, and everyone didn't know once you and draco go to the class and then professor Snape walks in and said

Professor Snape: ok who can tell me, is Vampire are real or just a myth?

Hermione: raise hand Professor Snape: yes granger?

Hermione: Myth sir You were sitting there smirking, while Draco, mattheo, Theodore,and Regulus stares at you