Sky Fall: Automata to Drifter

is a Japanese light novel series written by Minato Ishikawa, with illustrations by Tokichi. The series began publication on June 10, 2015 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Mankind has never seen the earth.

They built a city and a country centered on huge pillars and terminals that penetrated the heavens and the earth. Countless steel wires that connect the terminals, which are the remains of the old generation, and cross the sky. Riding a gondola hanging there, wanderers (drifters) live in and out of the city. As far as the eye can see, one side of blue.

"Warning. Dangerous, I'll fall into the sky."

Yes, this is-a world I don't know. In the sea of clouds floating in the blue sky, Kuuga, a young man who had collapsed due to memory loss, was picked up by the innocent wanderer Suzu and the mechanical doll (automata) Air who devoted herself. What is the truth about yourself and the world that Kuuga knows while traveling with two girls?