The mansion, the vampire, the girl

Seras has bought a mansion that everybody says is haunded. Sure enough she meets the ghost of the mansion, a vampire named Alucard. Who seemed to have taken quit the liking to her. But as she tell her friends about this ghost, no one won't to believe her. Because only crazy people believe in ghost, right? So will they believe her by the end. Or, lock her up in a mental hospital?