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.
and "I bet that contrast would feel 
great if I sucked her blood,"
وأيضًا "أراهن أنّ ذلك التّناقض سيكون
،"رائعًا إن مصصتُ دماءها
Gerne würde ich an ihr saugen,
um diesen Unterschied zu spüren.
"seguro que el contraste al beberla
se sentiría genial"
"seguro que el contraste al beberla
sería un gustazo".
et je pense au chaud-froid
que ça ferait si je le lui aspirais !
"Chissà quanto sarebbe fantastico
il contrasto se le succhiassi il sangue."
Esse contraste seria uma delícia, 
se eu chupasse o sangue dela!
Если попить кровь, контраст
будет таким приятным.