Qin Feng, a notorious lunatic vampire hunter, based on the great principle of "I want to hunt down all the vampires", condescended to run to the underground arena to be a boxer, and then met a doctor there who had very fragrant blood...
Qin Feng: You must be a member of the Blood Tribe... Give me a bite, just one bite
Bai Lu: If you are not sick, get out of my clinic
Concept: One word, sweet!