The Ghosts of Hogwarts

Helen Lovegood, Cyrus Malfoy, Hugo Weasley, and Lily Potter are in their fifth year at Hogwarts. They only thing they have to worry about is OWLS, who fancies who, sexual orientation, and quidditch practice. Until the ghost of Hogwarts start to disappear, one by one, starting with Helen's namesake, Lady Grey of Ravenclaw House. First story I tried my best, rated T cause Im scared.