The Last Vampire

Sita is five thousand years old and believes she is the last vampire. When someone begins hunting her, she thinks it is the client of a detective she killed. She enrolls in high school and befriends the detective's son, and later falls in love with him. 

Meanwhile, Sita's creator Yaksha has been following her, believing he must kill her to atone for his sins. Sita thought she had killed him years before.