Ghost Protocol: the Secret Behind the Rise of Mecha from Scratch

In this world, mechas decide everything about you. Determine whether you can go to school, whether you can work, and whether you can be treated as a human being. Mecha, you are a citizen. Without mecha, you are "naked" - not even qualified to be exploited. He was rejected from all schools, he couldn't advance to higher education, and he couldn't get a new mecha. But his grandfather left behind a dilapidated antique mecha. They all said he was useless, but they didn't know that in the core of his mecha, there was a secret that was being hunted by the whole world. They didn't know that the low-level boy who was picking up scrap metal in the garbage dump was about to reveal the biggest lie on the planet. "Some things never really disappear. They just stay hidden." This is a story about partners and bonds. It's not a legend of genius, it's the glory of scrap metal.