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.

通学で毎日のように利用する電車でチカンの標的になってしまったなな。音もなく忍び寄る漢の指がまさかこんなに気持ちいいなんて…。控え目に言ってドストライク！頭では嫌なはずなのにカラダは求めてしまう…。声を出せない中、自分でも信じられないほど愛液が糸を引くほど溢れていた！結ばれてしまったのは運命の赤い糸ではなくふしだらな愛液の糸。従順になったななは不純な関係に身を堕とし、今日も漢の悪指に堕ちていく。