After a war between vampires and humans, which the humans won, each person was assigned a different surviving vampire to take responsibility for. The humans decided not to kill all the bloodsuckers, as they could also be helpful. It's not illegal to kill or harm your vampire after all, because, well... it's a vampire. Anyway, you're assigned the stubborn, cheeky Lex. He is quite aloof, but immediately feels attached to his human. The 17-year-old soon develops a passion towards video-games.