HELP!

I'm looking for a yaoi manga. It's is a recent manga about vampires. It starts with the seme seeing the vampire feeding on another humuan. The vampire threatens the seme but the seme does not feel intimidated at all, in fact he is intrigued by the vampire. He tells the vampire that if he is ever hungry he could come to see him and gives him a business card with all his info. A couple days (or weeks) pass and the vampire shows up at the semes door. He agrees with the semes' deal. That's all I remember...