All kinds of Uncensored Chikan clips. Unfortunately, most of them were short, or censored with pixelated dick, because Japan. (You can show cartoons of schoolgirls being raped by tentical monsters, but they have to blur out the genitals, because that might be obscene.)
For example:
Part I, and
Part IIJust FYI, Chikan means public groping, and sex on trains, and busses. I couldn't get off to the clips, so I had to write a story (In SSBM) to finish.