In the dimly lit, echoing tunnels of the metro, a stranger in a business suit and glasses approaches a woman waiting for her train. She's dressed in a revealing, low-cut top and a short skirt, her hair disheveled. He whispers into her ear, his hand grazing her thigh. She looks around nervously, but the platform is deserted. His hand moves up her skirt, finding her wet, ready pussy. She moans softly as he finger-fucks her, her eyes closed, lost in the sensation. Suddenly, a train rumbles in, its lights illuminating their silhouette. They don't stop. He unzips his pants, revealing his hard cock. She turns around, bending over, and he enters her from behind, fucking her hard and fast as the train pulls away.