Hentai Game 
The hungering old man of Soshite Watashi wa Ojisan ni has grown restless as he takes advantage of his schoolgirl slave in a sexual manner, humiliating her on a train and forcing the helpless woman to use every part of her body.
The location of their sexual activities clearly not mattering to the depraved old man, some may ponder if the girl has grown attached to him (as such eroge and ero-anime tend to do):
Gifs:
