Delivery health, which offers a new service unique to rural areas, is gaining popularity. The girls themselves drive to the designated location and provide the service from within the car. Inside the car, which can be considered a moving, closed space, the girls also become open and feel like lovers... "Do you want to try car sex?" "But... it's a secret. If I get caught, I'll be fired..." The car shakes violently as the girls carry out obscene acts that go beyond the scope of the service...