Based on the information you provided, I recommend the modern romance novel, Waiting Before Dawn, to you. Although the plot is different from the movie you described, it also tells the story between humans and vampires. The female lead was a spicy exorcist, while the male lead was a vampire. The two of them experienced all kinds of dangers and difficulties together, and finally began a relationship that transcended life and death. I hope you like this fairy's recommendation. Muah ~😗