Kyuu wa Kyuuketsuki no Q

I thought high school girls' blood was supposed to be sweet...! Your blood is disgusting!

One day, Kyuu, a vampire in training, appears before Eiwa Ei, a lazy high school girl. In order to become a fully-fledged vampire, Kyuu must suck Ei's blood...but it's absolutely gross! Thus begins a fledging vampire's struggle to keep a high school girl healthy.