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.
In summer, I can't even wear short sleeves!
في الصّيف، لا أستطيع حتّى ارتداء 
!ملابس بأكمام قصيرة
Im Sommer kann ich nichts
Kurzärmeliges tragen.
Ni siquiera puedo usar
mangas cortas en verano.
Ni siquiera puedo usar
manga corta en verano.
Je dois mettre des manches longues
même en été !
D'estate non posso
nemmeno mettermi in maniche corte!
No verão, não posso usar manga curta!
Летом я даже короткий рукав
носить не могу!