As you can see this is a story about A Priest and his vampire.
Claude’s vampire who likes to go from a Town to another to live and feed one day he put his eyes on a priest who looked crazy delicious but what he didn't expect that he will become the prey. The priest turned out to have a personality of a mean demon, and Claude just can't figure out what he wants from him.
Shinpu-sama No Kyuuketsuki