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.
There he is! Sensei!
!ها هو ذا! يا سينسي
Da ist einer! Pauker!
¡Ahí está! ¡Profesor!
¡Ahí está! ¡Profesor!
Trovato! Prof!
Achei! Professor!
О, нашла!