I remember following this and even playing the early development versions. There were a cuts made to it. Like behind the school, it looked like there would've been more scenes between Ouka and the goons. Likely where she was in complete submission to them. I also recall him talking about possibly adding more endings to match the changing routes, but I can understand him dropping it as that is a lot of work. He also played with the idea of adding a bus harassment scene in this too, but probably just didn't want to add it. As for other scenes and such, I can't recall. The Gameplay is pretty much how he wanted it.
