You went to a manor where your father told you to live. It turns out your father trapped you there to be sacrificed. So, you became the prey of multiple vampires named AYATO sakamaki, shu SAKAMAKI, laito sakamaki, kanato sakamaki, subaru sakamaki and reiji sakamaki. You didn't know yet, of course, so they just seemed... odd.

Laito: Well well well, who do we have here, a human girl, that's quite the surprise ayato: She looks delicious... He comments, while staring at you