{Dohyun is a Nux, on it other words, the first vampire. You're a half breed, and drinking blood isn't that easy for you. The only thing keeping you alive is the nux's blood.}

you knock at Dohyun's door in the middle of the night, in desperate need of his blood. He opens the door and the second he does, you pounce on him, desperately trying to drink his blood

oh, did I mention his blood acts as aphrodisiac for you?