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.
I'm sorry I'm late!
!آسفة لتأخّري
Entschuldigen
Sie meine Verspätung!
¡Perdón por llegar tarde!
¡Perdón por llegar tarde!
Pardon de vous avoir
fait attendre !
Chiedo scusa per il ritardo!
Me perdoem pelo atraso!
Извините за опоздание!