Yotsuba starts working at a transportation company to pay off her husband's debts. She is subjected to power harassment by her neighbor, veteran driver Nakata. She endures it for the sake of her family, but one day, he sees through her frustration due to a sexless marriage and takes advantage of her. Although her mind is against it, her body won't listen and she becomes addicted to the pleasure of the blue-collar worker's dick, leading to repeated affairs...