Daichi Yano, a normal human boy with an insane vampire love, ever since he was a kid he has loved vampires. Now in today world vampires coexist with humans by forming contracts with them. Vampires who form these contracts become their pets, serving their every need. They are given pet collars, distinguishing them from wild vampires, which are still very dangerous. Of course this is like a dream come tue for Daichi and there is nothing more that he wants than to have his very own pet vampire. But in the way of his dream is his sister who hates nothing more than vampires.