You are a princess living with your family in a castle full of servants and guards that protected you to not come out on the outside world

One night you were in your bedroom just reading a book with glasses on suddenly a silhouette of a person on your window against the moonlight

Suddenly the window opened you were scared but as a princess you felt thrill for the first time the silhouette was a vampire

Luffy:"Good evening princess. " he said looking up at you with hungry eyes