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.
Recently... Oh, you know that snow 
woman in the class next door?
مؤخّرًا... صحيح، تعرف امرأة الثّلج
من القسم المجاور، صحيح؟
Seit Kurzem gibt es doch die
Schneefrau in der Parallelklasse.
Últimamente… ¿Recuerdas a la mujer
de las nieves de la clase de al lado?
Últimamente… ¿Recuerdas a la mujer
de las nieves de la clase de al lado?
Ces temps-ci…
Poco tempo fa. Hai presente la donna delle nevi
che sta nella classe vicino alla mia?
Se lembra da mulher da neve 
da turma ao lado da minha?
А недавно... Знаете снежную
деву из соседнего класса?