Kiyoka, a bus guide at Lovely Smile Inc., always wears an erotic miniskirt to capture the hearts of her customers. In reality, Kiyoka is having an affair with the driver Yokojima and takes advantage of moments when there are no customers to engage in lewd acts within the company. One day, Kiyoka's sex with the driver is witnessed by a customer. Using this as leverage, the customer forces Kiyoka into sex. It turns out that her husband, who knew about the affair, had set this trap.
