―― In the taste and the scent of semen, tame the stubborn tomboy vampire.

A certain day, the oversea student suddenly came to the house of Protagonist. Because she is a princess of noble of certain Europe, it is said by father that it will treat courteously. However, she was not a girl only, vampire princess. Father of Protagonist actually, the vampire hunter is assumed to be an occupation. Vampires who hid in darkness from ancient times and threatened the human as a natural enemy. However, reconciliation with the human race is approved in history, most is coexistent now. As part of the coexistence, father who was the hunter had the princess of sucking blood noble go to study to Japan. Protagonist that spent general student life in Japan. It appeared suddenly, in the high-handed though it is lovely, the cohabitation life with a vampire heroine starts.