Yuriko, tormented by pent-up frustration, receives the vibrator she ordered and immediately begins masturbating right at her front door. In her excitement, she forgets to stamp the delivery receipt, causing the delivery man to return—only to catch her in the act. The sight instantly makes him erect, his crotch swelling with an enormous bulge. Before she knows it, Yuriko finds herself indulging in the unexpected turn of events, thoroughly enjoying the delivery man's massive cock.