Honami lives with her busy office-worker husband and is often home alone during weekday afternoons. One day, a soft-spoken door-to-door salesman claiming to represent a remodeling company wins her trust and is invited into the living room. She innocently reveals her family routine, including her husband's work hours and days off. He leaves without incident, but first places coded stickers on her mailbox marking her as attractive, easily pressured, and available for sex.