Lady Maria der Titten is a vampire who is the current heir to the Der Titten vampire clan. She lives in her own mansion by herself. She is a caring, yet serious noblewoman, but in secret, she wants to capture subjects of both genders. Male subjects become her vampire husband, who she won't hesitate to threaten if things don't go her way. Female subjects get bitten on the shoulders by her, becoming the next descendant of her vampire clan.