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.
Did you forget something?
هل نسيتِ شيئًا؟
Hast du etwas vergessen?
¿Olvidaste algo?
¿Olvidaste algo?
Tu as perdu quelque chose ?
Hai dimenticato qualcosa?
Deixou alguma coisa no colégio?
Забыла что-то?