Charlotte. La princesse des vampires

One day, a foreign exchange student suddenly arrives at the protagonist's house.
She is a princess of a certain European noble family, and the protagonist is told by his father to treat her with respect.
But she is not just a girl.

--She is a vampire princess.

In fact, the protagonist's father is a vampire hunter by trade.
Since time immemorial, vampires have lurked in the darkness, threatening mankind as natural enemies.
However, throughout history, they have made peace with mankind, and most of them now coexist in harmony.
As part of this coexistence, his father, a hunter, took in the vampire noble princess to live in Japan.

The protagonist was leading a typical Japanese student life.
Suddenly, he finds himself living together with the heroine, who is dainty, high-spirited, and yet, a vampire.

[Translated from DLsite]