In an almost empty train car, a cocky J-pop idol girl gets on at a later station and sits across from me, our eyes meeting repeatedly. She keeps shifting her legs, revealing glimpses of her panties. As if to taunt me, she flashes her underwear and sends me provocative glances... Sitting next to my fully erect self, she whispers in my ear, touches my lower body, and starts intertwining her tongue with mine in a shameless way! Even though we're alone, how far will things go inside this train?