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.
And I'd feel bad, making my classmates 
go out of their way for me...
وأشعر بالسّوء إذا جعلتُ زملائي
...في الفصل ينزعجون بسببي
Ich fühl mich mies, wenn wir
meinetwegen die Vorhänge zuziehen.
Y me sentaría mal
molestar a los demás por mí…
Y me sentaría mal
molestar a los demás por mí…
En plus, je déteste rester
avec les autres.
E non voglio che i miei compagni
siano costretti ad adattarsi a me...
Me sinto mal em atrapalhar os colegas...
Я не хочу просить
всех подстраиваться под меня...