Kiyoka, a bus guide for Lovely Smile Company, always captures the Kokoro of customers with her sexy miniskirts. In fact, Kiyoka is having an affair with the driver Yokoshima, and whenever there are no customers around, they repeatedly do naughty things in the office. One day, a customer witnesses her having sex with the driver. The customer uses this as an excuse to force Kiyoka into having sex with him. In fact, it was a trap set by her husband, who knew about her affair.