在学院都市洁儿尼中发生了一场骚乱，刚刚入学就读于普通教育系的新生雷冯（冈本信彦 配音）在混乱之中展现了自己出色的应变和战斗的能力，因此被学生会长发掘，转入了武技系，更获得了加入都市护卫第十七小队的资格。外冷内热沉默寡言的菲丽、恪尽职守坚韧强悍的妮娜、个性轻浮但十分可靠的夏尼德，这些奋战在前线的伙伴们，为了守护他们赖以生存的都市，甘愿付出血的代价。
这时，这位同学暴露了自己的真实面目，意识到自己是吸血鬼连环谋杀案的罪魁祸首，而凯莎是他的下一个目标。就在彩砂的生命危在旦夕之际，一个名叫安宅介贵（松冈真诚配音）的人出现在两人面前，成为彩砂的救世主。安宅原本是公安五班F班的一名搜查员。虽然他也是一个吸血鬼，但实际上他是一个吸血鬼猎人。安宅不仅救了彩莎，还带走了她的初吻，让彩莎坠入了爱河。
The woman next door; She became my exclusive special advisor. I will teach you the real skills to inspire women's enthusiasm! The so-called theoretical expert Seong jin only understands women through text, and whenever he sees his academic advisor Professor Mi ae, he feels excited. However, Meiai ignored his courtship and told him to come back when he grew up. He felt helpless and finally revealed his pain to the novelist Yang Hua who had recently moved next door. To his surprise, she said she would teach him about women and start coaching him on real-life courses from kissing to sex.
