Dragon Ball: I bet my left arm on my future

Traveling through the desperate future world, I became Son Gohan with one arm and scar on his face. It seemed like a hellish start, but Son Gohan, who crawled out of the grave, was grinning. Oh, despair? Look at me defeating all the bosses while chatting and laughing, and reaching the top of the universe. What? System? What do I need a system for when I'm Son Gohan? ...