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.
They taught us that in school.
.علّمونا ذلك في المدرسة
Hat man uns in der Schule
beigebracht.
Lo enseñaron en la escuela.
Nos lo enseñaron en la escuela.
C’est ce qu’on nous apprend
à l’école.
Ce l'hanno insegnato a scuola.
Ensinam isso na escola.
В школе нам так говорили.