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.
Yeah, the one from the other day.
.نعم، تلك الّتي قابلناها يومها
Ja, die Kleine von damals.
Sí, la del otro día.
Sí, la del otro día.
Oui, je me souviens d’elle.
Sì, quella dell'altra volta.
Sim, a que passou mal.
Да, мы её видели.