After the protagonist Lin Yifan traveled to a world similar to One Punch Man, he originally wanted to find Saitama to survive. Unexpectedly, instead of finding Saitama, he was killed by aliens who invaded the earth a year later. Then he was reborn again a year ago and activated the Dragon Ball system. At the beginning, he had Kaio Fist and Saiyan blood.
He decided not to eat beef this time (the author made a mistake about combat power. In Dragon Ball, the combat power of ordinary people is 5. I always thought it was 1. I exaggerated the numerical value of combat power. Sorry)