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.
Class 1-B, Takanashi Hikari!
!أنا تاكاناشي هيكاري من القسم 1-ب
Ich geh in Klasse 1-B.
Ich bin Takanashi Hikari.
¡Hikari Takanashi, de la clase 1-B!
¡Hikari Takanashi, de la clase 1-B!
Hikari Takanashi, en seconde B.
Sezione 1-B, Hikari Takanashi!
Hikari Takanashi, da turma 1-B!
Хикари Таканаси из класса 1-Б!