So I don't actually have a pic of the doujin because if I did, I'd probably be able to find it myself.
I found it over at nhentai, and have been searching for it since, but lost track of it.
The plot, from what I recall as it wasn't in english I think, was that a girl falls asleep on the bus, the bus driver takes advantage of her, they fuck, she leaves, and then he sets his sights on his next target.
One image I can remember in particular was he was fucking her from behind while standing, but because shes short, he was just lifting her up by her hips, leaving her legs dangling and not touching the ground.