I am looking for a hentai game (I think it might have been 3d) where you molest a girl with purple hair (I think it was purple) in public (I think a train/train station). She is potentially related to you, (I think sister potentially). Later on in the game she starts cooking for you at your apartment and you can continue to molest her. As the molestations continue she becomes more willing to have sex with you. I believe there might also be an ending where she ends up getting pregnant.
I don't recall if it was translated from Japanese.
I don't recall if it was translated from Japanese.