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...
If it's a succubus's nature 
to arouse sexual desire,
،إن كان من طبيعة السّقّوبات أن تثير الرّغبات الجنسيّة
Es mag in der Natur des Sukkubus liegen,
den Sexualtrieb zu erregen.
Si la naturaleza de un súcubo
es elevar el deseo sexual,
Si la naturaleza de un súcubo
es aumentar el deseo sexual,
Le désir que suscite un succube
chez un individu
Se la natura di una succube
è quella di stimolare i desideri sessuali,
Se a natureza de uma súcubo 
for provocar desejo sexual,
Если суккубам свойственно
вызывать похоть,