This game's pretty good, but it got released much too soon.
1) The story is basically non-existent after the intro.
2) There needed to be more camera angles, and more flexibility for actions. You can't have sex while grabbing her tits, you can only do one at a time. Looks like the game received an update, and the developer has added more flexibility.
3) There's no visible differences for the girl's corruption progressing, besides her just being easier to molest. For example, she could eventually board the train with no panties, or wet panties, or skimpier clothes in general. She could also board the train, already blushing, or already looking at the molester. None of this happens, it always starts the exact same, and the only thing that changes between runs is what type of basic panties she is wearing.
My biggest issue is the 3rd one, since the dev very clearly had the assets to execute this, if he wanted to. This is a good game, but it could have been great.