Yuko joined her neighborhood association's leisure trip, standing alone in front of the inn with a gloomy expression. When her husband approached with concern, she forced a smile and insisted she was fine, but beneath it lay deep anxiety. A year ago, Nakano—the man who once treated her like a younger sister—raped her and took photos. Now he's blackmailing her, threatening to expose the images unless she becomes his obedient female dog during this neighborhood trip. Desperate to keep her husband from finding out, Yuko endures his humiliating demands, but Nakano's orders grow increasingly extreme, casting a dark shadow over her mind.