Emma starts working for her husband's transport company, but she suffers from the bullying harassment of her neighbor, Ozawa, an elderly driver. For the sake of her family, Emma has to put up with it all. But one day, Ozawa sees through her frustration at the lack of sex and takes over the job. Her reason objects, but her body won't listen, and she becomes addicted to the pleasure the blue-collar worker's penis brings, leading to frequent cheating on her...