Man of Rust

The sixth sense is the ability to perceive the providence of nature with one's mind and transform it into power.

At the bottom of the earth is the "falling world." One day, Ruo, a boy who dreams of the skies, comes into possession of relic iron—the carcass of Tetsujin, a monster from the earth. However, it is a forbidden power that must not be touched! His goal is to reach the surface.

This is a "super-righteous boys' manga" in which a good-for-nothing changes the world.

(Source: Kodansha, translated)