I Will Be Cannon Fodder in the Future

The light of civilization belonging to the earth finally illuminated the entire dark forest. Carrying the mission of saving the world, we come to the future 7,000 years later! Isn't it true that giving it a try for this world means realizing the value of life on the spot? ! What! ! ! I'm not a warrior who was called to save the world. I'm originally from the future? If I'm lucky, I'll be able to witness my own birth? The journey through time and space is not a gamble, but a return home! ! ! !