Raped by an Angel 2: The Uniform Fan(1998)

A dentist obsessed with young women in uniform stalks two sisters. Yue Po Wan, the older sister, is a policewoman who is romantically pursued by a thug just released from prison. Jenny, the younger sister, is a schoolgirl and a girl-guide - and has been invited along with all her schoolfriends to the dentist's holiday home.