The story and narrative that is told is based off player choice it's an interactive walking simulator.
spoiler (click to show/hide)
Talked to Campo Santo at PSX about possible stories surrounding this world and was told they are interested in exploring other characters stories in the same universe. I don't know if that means much, but I took it as they have more stories to tell here than just this initial story.
I'll buy it when it's on sale. No offense to their work here, but I'm just not gonna support console exclusive bullshit from indie's/thirdparty anymore.