Coming Out is a 2000 South Korean short film directed by Kim Jeewoon.
Hyunjoo announces to her younger brother Jaemin and his girlfriend Jieun that she has an important confession to make, and asks them to record it on video. After issuing an apology to her parents, she reveals that she has been hiding a painful secret and is not like normal people she is in fact a vampire. Jaemin and Jieun initially think she is playing a prank, but to prove her sincerity Hyunjoo bites into her wrist and starts to suck her own blood. She goes on to disclose further details of her life as a vampire, and dispels many of the common myths associated with the legend. Having heard of others like her overseas, she has decided to join a community of vampires living in England.Going out at night to attract less attention, Jaemin films his sister as she feeds on a young woman in a telephone box. He and Jieun later talk to the woman, who remains unharmed, and she tells them that the experience was not painful, likening the sensation to an electric shock. The events prove to them that Hyunjoo is telling the truth. ........
Source: Wikipedia