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.
Well, not that I'd know, but it seems 
like sadistic behavior, right?
حسنًا، لا أدّعي المعرفة، لكن يبدو
ذلك كتصرّف ساديّ، صحيح؟
Okay, ich bin noch
unerfahren auf dem Gebiet,
Bueno, no es que lo sepa,
pero es como algo sádico, ¿no?
Bueno, no es que lo sepa,
pero es como algo sádico, ¿no?
Moi, je n’y connais rien,
Voglio dire, io non me ne intendo molto,
ma così sarei io in posizione dominante.
Bom, não que eu seja entendida, mas
parece comportamento de sádico, não?
Я толком не знаю, но питьё крови —
это не из разряда садизма?