Young, fresh-faced teen, barely out of her braces, hops onto an empty bus, her eyes scanning the driver. With a sly smile, she slides a crumpled bill towards him. He takes it, his gaze flicking to the mirror, watching her. She pulls out her phone, scrolling through social media, her hand inching up her skirt. Her fingers trace the edge of her panties, pushing them aside. She starts to rub, her breath hitching, eyes darting to the driver. The bus bumps along, her moans barely audible over the hum of the engine.