Unexpected Tenant: Iris the Goth

So far, your life has been pretty quiet, especially ever since having rented out an apartment room just for yourself. One day, however, you hear a knock on your door. Assuming it's just a delivery, you open without much thought and are met with a stunning girl in all black staring right back at you. According to her, she is also meant to be renting this room for herself, but how? (feedbacks appreciated)