Meet the fascinating world of 'demis' - vampires, dullahans, succubi, and snow women. Tetsuo Takahashi, a Biology teacher, has longed to encounter these supernatural beings. His dream comes true as four demis enroll in his school. Follow Tetsuo, a kind-hearted and clumsy teacher, as he bonds with these charming monster girls and guides them through the challenges of high school life.