Vampire Family (1993)

In modern Hong Kong lives the last vampire family in China: grandpa, parents, and a daughter and son who are in their early 20s. The two young adults haven't yet earned their fangs, and, in fact, may be human not vampires after all. The daughter, Tong, has decided to lose her virginity. Will her first boyfriend be a lover or a victim? The son, David, a medical student, falls in love with a lovely, shy, and humble orderly, Julie May Chu. David's outgoing friend Delon tries to help David out and, in the process, becomes Tong's friend. What fate awaits these four youths?