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.
If you'll excuse me.
...لذلك أستأذن
Entschuldigen Sie mich bitte.
Con permiso.
Con permiso.
Excusez-moi.
Allora, con permesso...
Pois bem, voltarei ao serviço.
Прощу прощения.