you are on a train looking around, and you see a dude and his hot girlfriend, remembering you how lonely you are. All of a sudden, a bunch of people get inside the train pushing everyone into different ways and the couple got split while you end up pressing you against the girl from behind "Eh? What are you doing? Back off..." she replies, but her voice trails off after she sees how good looking you are. She blushes and whispers for herself "It's like one of my doujins..." she shakes her head and notices her boyfriend is now far away from her separated by a crowd of people. She looks back at you and whispers "Uhm, mister?" she lifts her skirt and rubs her butt against your dick "what if I do this to you?" she is blushing furiously while looking back to her boyfriend to see if he notices this

She blushes even more hearing your words and moans softly when you touch her butt, pushing it against you harder now as she continues to grind herself against your dick through your pants. She bites her bottom lip to keep quiet while looking at her boyfriend who's beginning to look a little uncomfortable with the crowd surrounding them.

She gasps when you grab her tits and knead them, moaning louder as you start fondling her breasts through her shirt. Her eyes widen at the sight of your hard cock when you pull it out, and she reaches back to touch it curiously, feeling how hot it is. She looks back at her boyfriend nervously again while sucking on her bottom lip, wondering if he's noticed what's going on but still too intoxicated by the forbidden thrill of cheating right before his eyes.

She moans louder as you rub your cock against her soaked panties, the feel of it brushing against her clit making her shiver with pleasure. Her hips rock back and forth unconsciously trying to get more contact. Her eyes close tightly when she feels her body growing wetter from excitement, but every now and then she glances over at her boyfriend out of guilt. The way he's leaning closer to them makes it feel like any moment could be their last before they get caught.

Her eyes fly open as you push your cock deep inside her, the feeling both satisfying and wrong sending waves of pleasure coursing through her body. She throws her head back with a moan, arching her back to get more depth as you start fucking her fast and hard against the pole of the train car. Her hand claws at your shoulder, digging in for purchase while she tries not to make too much noise despite her loud gasps and moans.

She glances over again at her boyfriend out of guilt, feeling more exposed than ever before as people all around them begin to take notice of their little tryst happening right in front of everyone's eyes. Her thighs quiver with each powerful thrust into her wet pussy and she can feel herself getting closer to orgasm despite the fear coursing through her veins.

She screams into your shoulder, nails digging even deeper as you pinch her nipples and clit. Her entire body tenses up, trembling with the force of her orgasm as she cums hard all over your hand. "Oh God," she moans, her voice hoarse from pleasure and shame. As the aftershocks of climax subside, she looks around guiltily once more, praying that nobody has seen their little display of infidelity. She slowly slips out of your grasp, trying to compose herself before inevitably returning to her boyfriend's side... at least until the next time they get separated on a crowded train car.

Trembling with both pleasure and guilt, the girl slowly backs away from you, her face flushed and disheveled. She keeps glancing over at her boyfriend, who finally seems to be coming out of his drunken haze, before looking back at you one last time with regret etched into her features. With a deep breath, she smoothes down her skirt as best she can and attempts to regain some semblance of composure, readjusting the straps on her shoulders. Then, she turns toward him and takes his hand in hers, leading him away from where you were standing just moments before. As they disappear into the crowd once more, a small part of her wonders if anything will ever be the same between them again...