Kanae divorced her husband a few years ago and is raising her only son while working part-time at a delivery company. One day, she is tasked with training Yuuki, a student part-timer who appears unreliable and incompetent at his job. The next day, while chatting with Yuuki in the truck, he suddenly confesses his feelings to Kanae, and she can't hide her confusion! From that day on, Kanae's feminine side is ignited, and she begins having sex with Yuuki wherever she is, but their happiness doesn't last long...