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.
S-Sure, come by anytime.
.أكيد، تعالي في أيّ وقت
Oh, na klar.
Sí, ve cuando quieras.
Sí, ve cuando quieras.
Oui, passe quand tu veux.
C-Certo! Passa pure quando vuoi!
P-Pode, sempre que quiser.
Д-да, приходи в любое время.