I'm a Max Level Regressor

I'm a Max Level Regressor summary:

s a member of the \"Nine Road\" for decades, I\'ve traveled the world preventing global catastrophes. My long-awaited retirement was finally within reach. At 56 years old, what awaited me was the fame of being a battle-hardened veteran who had reached the highest EX rank, and countless accolades as humanity\'s hero and Earth\'s guardian! All that was left was to truly enjoy a life of wealth and glory! And just as I was about to settle into a comfortable retirement... \"Aaaargh! This can\'t be happening!\" I woke up to find myself as my 24-year-old self from 32 years ago! Even worse, I\'m back in the past when I had absolutely nothing!!! \"I wasn\'t supposed to be the regressor!\" Moreover, Nicholas from the Nine Road was meant to be the returner. Does this mean I have to gather the Nine Road myself from scratch? A life forced to start over as an unexpected regressor! This time, I\'ll finish things quicker and try to enjoy life.