Nanako Mori lives next door, her husband away on a work assignment, leaving her alone in the house. She's a warm and affectionate neighbor, especially close to the father and son living beside her. She often brings the son, Gaku, home with her after shopping and shares dinner with the family, showing her kind and approachable nature. However, ignoring her feelings completely, the father secretly installs hidden cameras inside her home. The son, abusing his privileged access, begins playing increasingly invasive pranks, escalating the situation. How will Nanako respond to these violations, and what consequences will her choices bring?