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.
My classmate isn't feeling well!
!لا تشعر زميلتي بتحسّن
¡Una compañera se siente mal!
¡Una compañera se encuentra mal!
Una mia compagna di classe si è sentita male!
Uma colega passou mal!
Моя одноклассница плохо себя чувствует!