Alexander Muller is a Vampire!! -Alexander or Alex or Mu-chan(for girls) is a transfer student from Germany came to Millie Academy in Japan. He is a very handsome and tall boy. Then he met the ever small and fragile Kitagawa Mikuru (Micchin). The first time they met was when Mikiru was being bullied, and Alexwas the one who saved him. And there start their love story. But! What will Alex do when upon deciding that he will protect him turns out that Mikuru is the only Japanese person who can be compatible with him and can only drink Mikuru's blood? He doesn't want to brake the ever fragile Mikuru but he'll die if he doesn't consume his domina.