Hike to the End of the Universe

For travelers traveling through time and space, a pair of clear footprints in the white desert prove that someone has also walked here. At the end of the trip, our homeland was a deserted land, with human souls floating in the sky. When he was walking alone on the desolate ruins, his wife stood at the end of the ruins, shining brightly. She is a human, but she comes from a world outside her home. That world is another home built on the human home - the second-order world.