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.
Bye-bye, Machi-san.
.ماتشي-سان، مع السّلامة
Bye-bye, Machi!
Nos vemos, Machi-san.
Nos vemos, Machi-san.
Machi, bye bye !
Ciao-ciao, Machi!
Machi, tchau, tchau.
Мати, пока!