One day in Tokyo, "Honoka," an insurance saleswoman who had just finished explaining a policy, realizes she left something behind after completing the contract. She heads back to the man's house. Finding no answer when she knocks, she reluctantly forces her way in. From inside, she hears a woman's moaning sounds. Curious yet cautious, she moves forward and discovers the man she had just met engaging in light BDSM with an unfamiliar woman. Hiding nearby and secretly watching, Honoka gradually grows more intrigued, eventually becoming so aroused that she starts masturbating. Suddenly, the door opens and her spying is discovered. This incident marks the beginning of a new chapter in her life, one that will be reported back to her insurance company.