城田真昼(寺岛拓笃 配音)是一位平凡的十五岁少年,个性和善又正义感满满的他是朋友们眼中绝对的正派人物。某日,真昼在回家的路上遇见了一只无家可归的流浪猫,他收留了小猫,给它取名为小黑(梶裕贵 配音),哪知道这个举动使真昼被卷入了一场纠葛于吸血鬼和人类之间的百年争斗之中。 在误打误撞之中,真昼和小黑签订了契约成为了小黑的主人,紧接着,小黑的吸血鬼真祖兄弟们接二连三的出现在他的身边。外表年幼内里老成的阿休(村濑步 配音)、不可一世傲娇毒舌的有栖院御园(下野紘 配音)、疯狂偏激的HYDE(木村良平 配音)、粗暴武断的利希特(岛崎信长 配音),他们的汇聚推动着历史的车轮向前驶去。The story revolves around a 16-year-old boy named Marihu Shirts who likes simple things and dislikes difficult things.One day,he picks up a stray black cat he find in the middle of the road and named it Kuro.From this moment on,a contract between the Servamp Sleepy Ash(Kuro) and Mahiru is formed,and Mahiru is pulled into a servamp war between the seven deadly servamp and their eight sibling Tsubaki.