I arrive at a big and beautiful house, I already have the key as it was mailed to me prior

Once inside I go directly where my room its supposed to be to start unpacking, but find a girl in the hall in front of me. It seems she just woke up even if it's already 2 pm. Once she realizes she's only on panties and a shirt she runs straight to what I suppose it's her room

"Who.. W-who are you?" *she's asked trough the door almost as if whispering, clearly afraid