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.
A second demi-human... I can't believe it.
.نصف بشريّة أخرى... لا أصدّق هذا
Unglaublich, ein Halbdämon
kommt selten allein.
Otro semihumano, quién lo diría.
Otro semihumano, quién lo iba a decir.
Ça nous fait deux ajin, maintenant…
Non ci credo, un secondo semiumano...
Quem diria, mais uma meio-humana?
Вот это да, второй получеловек.