Traveled to Another World for a Hundred Years and Returned Now Invincible

It tells the story of an ordinary young man who traveled through a different world for hundreds of years during his trough period. He led a team to fight for the other world to become the savior that everyone respects. The passage connecting the human world and the other world was opened. He once again led the team to fight in another world to save it and prevent the human passage from being invaded by aliens.