The Final Space Marine

In 2187 AD, the human colonial home planet Charon was completely defeated in the seventh defensive battle against alien predators. Third-class maintenance soldier Noah Valen was abandoned in the ruins by the retreating troops. When he was about to die, he forcibly connected an experimental mecha code-named "Cain". The ancient combat gene was forcibly activated, and a maintenance worker who could only repair parts was forced to become the most uncontrollable variable on the battlefield. He doesn't He is the chosen one, he is just an experiment chosen by "Cain"; he is not the savior, he is just a waste who did not die. Between the collapsing steel and alien blood, Noah will step by step encounter a scam that is bigger than he imagined - but that is all for later, now he just wants to live.