Exhibitionism: Roshutsu Seiheki

Ryoko, a girl who just can't seem to get it on without being in a place where people can see her.
This adventure game features you, who has finally gotten a chance to get to know her and ends up having sex in lots of fun exhibitionist ways on the train!
How will this all end, with a girl of such weird sexual disposition...?

[from DLsite English]