Science Fiction: Future Mecha

In 2121, with the continuous research and development of human technology, a new type of weapon emerged - the super mecha. As an advanced weapon in this era, super mechas are far more maneuverable and destructive than previous weapons. So the question is, why are super mechas created in such peaceful times? Is it really just to protect one's own country? Mu Cen, a high school student, had to become a mecha warrior under the "patient guidance" of his family. But when he became a mecha warrior, he found that it was not as simple as he imagined...