A young woman named Nana finds herself the unwitting target of a perverted man on her daily commute by train. Despite her initial discomfort, she can't help but enjoy the sensation of his fingers exploring her body silently. She struggles between her inner resistance and her physical desires, eventually succumbing to his advances. As their encounter intensifies, she becomes overwhelmed with pleasure, losing control of both her voice and her body as her arousal takes over. In the end, it seems that fate had nothing to do with bringing them together; rather, it was the filthy bond created by their shared lust that led them down this path. Today, like every other day, Nana submits to the dirty hands of this persistent man, embracing her role as his willing partner in crime.