Philosophical horror (aka the best kind)
First I just have to say that I am not usually a horror reader, so the fact that I found myself interested in this is in itself a sign of your talent as a writer. Now as for the actual review...
Read the story now
The greatest enemy humanity can ever confront is our own mind, and you've done an excellent job of portraying that. Whether the events taking place are literal or all occurring in the narrator's mind, or a combination of the two (and I could see it being any of those), it is a fascinating narrative with wonderful description and detail. I can actually picture all these warped dystopian things occurring, like something you might see in a movie. Now as this story looks like it's just getting started, it's okay that the plot isn't too well developed yet. We know that this person has a very personal connection with a "him" who has not been named, but we can conclude that he was very close to the narrator, and whatever happened to him may be part of the cause of the protagonist's dark visions while on the bus (which also seems to hold special significance to them). Other mysteries would include why the city is abandoned, what role the monster-like creatures from chapter 3 are playing in the story, and of course, what happened to this "him", and how to explain the protagonist's lurid visions. Again, I would not be surprised given how philosophical and deep this story is if it was all in his head, a mental prison that he keeps himself trapped in, unable to break free. But either way I am now intrigued and wonder what will happen next, so well done!