The aliens who were picked up by Superman at the beginning

My name is Li Zhen. A distinguished graduate of Vitrum, and also a traitor to Vitrum. This civilization is too cruel, so cruel that I can't help but miss the peaceful days I spent on Earth in my previous life. Therefore, on my coming-of-age day, I made a momentous decision. Taking advantage of the other Vitrum reserve warriors' relaxation after conquering a planet, I stole a spaceship from a ruined, unfortunate planet, intending to travel to Earth for a leisurely time, even if it meant being purged by Vitrum afterward. But when I finally arrived near Earth after countless hardships, a guy I never expected appeared. Why is there a Superman on Earth?!