The perspective of the zombies on the mass grave, the background of the demonic path... No CP, no demonic characters involved, the main plot may be slightly intertwined with the demonic characters, but it does not affect the development of the plot at all. It is just a cutscene, and I wrote it for myself to play, about the survival and destruction of a walking zombie...
In short, it is the story of a zombie girl raising a younger brother.