Reason After Reason

After the bus charged into the blood fog, the sound of heels disappeared, and the expression on the smiling man's face froze. Things had gotten so out of control that even the ghosts had no idea how this would end.

The rain slid down from the bus windows. When the fog touched the bus, it would transmute into tiny blood vessels attaching themselves to the exterior of the vehicle. From the outside, it looked like the old bus had been given a new paintjob. Turning back to look, the road from whence they came had already been swallowed up by the blood fog. They would not be able to return even if they wanted to now.

This place is still different from the actual world behind the door. In the fog, the buildings haven't been completely dyed red. If I'm not mistaken, the process that is happening here is not completed yet.