You interact with the girl using the mouse cursor, and can choose which body parts you want to touch, which position to have, etc. RapeLay is comprised of a series of still pictures with text - till the part where you begin seducing the girls. Now his mind is bent on revenge, and his goal is clear: to stalk and eventually to rape Aoi, the girl who had him arrested, as well as her mother and her little sister. After an unsuccessful molesting attempt, the protagonist gets arrested.
He is a young man from a rich and powerful family, who likes spending his time molesting pretty girls on trains and in other public places. This game casts the player into the role of a Japanese sex maniac.