Trash Mech to SSS: My OP System

Written off as the weakest mechanic in his guild, a struggling worker in a modern city has spent years being ridiculed by those who once looked down on him. Everything changes when a hidden system awakens inside him, promising power that could lift him from the bottom rank to the very top. Now he must balance an ordinary office life with a secret climb through the ranks, while those who mocked him begin to realize that the underdog they dismissed is no longer someone to ignore.