Hearing that erotic middle-aged men and lonely, unattractive bachelors could be targeted, a group of men gathered upon learning that uniformed girls would be available. They propose jointly operating a delivery health service, sending a quiet, big-titted girl who's weak against male advances as the call girl, while the organizer handles phone bookings. The girl, nicknamed "Tomochan," agrees to creampie sex if seduced. A sleazy scheme unfolds, profiting heavily from extension fees and creampie service add-ons.