The life of Sayama, a woman who loves to imagine and read novels, has completely turned a new page since she mistakenly walked into her neighbor's fateful room. It would have been just one mistake to enter a normal room if it hadn't happened at the wrong time: he was masturbating. This is the reason why she has become a completely different person, but no one can blame her because she is the one who decides for herself, choosing this own path for herself. The pussy erection began to take place after a long period of time when her husband forced her intimate area to be closed because of physiological weakness, just when the neighbor was masturbating and she was also holding a novel about physiology in her hand, so curiosity, eagerness and sexual desire were inevitable. Unable to control herself, she raped her neighbor on his own accord. It was also the basis for the two of them's later sneaky acts.