Takahashi Tetsuo, a biology teacher at Shizaki High School, has been fascinated with "demi-humans," beings with characteristics that differ just slightly from humans, since he was in college. He wishes he could have a chance to talk with one, but since the demi-human population is fairly low, he's never even met one. But then the school gains a new math teacher, Satou Sakie... who happens to be a succubus.
Demi-human Welfare Division
قسم خدمة أنصاف البشر الاجتماعيّة
Halbdämonen-Sozialamt
División de Bienestar de Semihumanos
División de Bienestar de Semihumanos
BUREAU D’AIDE AUX AJIN
Dipartimento Previdenziale per Semiumani
Divisão do Bem-estar dos Meio-humanos
Отдел социальной
поддержки полулюдей