This is the game of the gods and the choice of the story line. Should you save human lives in this world and achieve peace, or sacrifice most human lives in exchange for a longer-term operation of the world? What if you witness the demise of human society in the future?
In an ordinary two-dimensional magical world, with racial melee between humans, demons and elves, and a precarious planet, as a time traveler, how would you choose?
Does protecting the world mean protecting humans? Can humans make good use of Ultraman's power? What is the right choice?
But in the vast universe, is this kind of thing real? Is the traveler really coming here from the original world, or is he dead and just a copy-pasted clone?