Succubi are demi-humans that arouse sexual desire in men and cause them to have obscene dreams. One such succubus, Satou Sakie, is extremely careful in every facet of her life, from where she lives to the trains she rides to the clothes she wears, so as to avoid causing these reactions in men. With girlish dreams such as romance and marriage so far out of reach, she thought she'd reached a compromise in her own life, but something changes when an accident causes her to grab Takahashi Tetsuo's hand...
You need to know the sin and cos values, 
and also how to find them...
،عليك معرفة قيمة الجيب وجيب التّمام
...وكيف تحسبينهما أيضًا
Präg dir nicht nur die
Sinus- und Cosinuswerte ein,
No solo debes memorizar
el seno y coseno,
No solo debes memorizar
el seno y coseno,
C’est le raisonnement qui compte,
pas les valeurs du sinus et du cosinus.
Non devi imparare a memoria
i valori di seno e coseno,
É preciso saber o seno e o cosseno,
 e a forma de como descobri-los.
Не зазубривай таблицы синуса и косинуса,
запомни, как они вычисляются...