Rin, a newlywed who has just started attending driving school, meets a teacher who is younger than her husband. She is drawn to the gentle and reliable teacher, and when they are alone in the car during the lesson, she can't contain her excitement. One day, in an empty training room, Rin confesses her feelings to him, and after crossing the line, she opens her pussy wide in the cramped driving car, and the next day, and the day after that, she welcomes the teacher's huge cock, despite being a married woman.