"Space and Time Tunnels"
The staff of the World Union sent research teams and many people in this field and they all had checked that the few stable tunnels that appeared just now were like random coordinates.
It didn't lead to a specific place, which means the potential of having a war with a specific world should be small, but this means they would welcome many people from tons of worlds.
The tunnel was not that big, and only less than 100 people could pass through at the same time, but even so, the world leaders, who were not prepared to step into this stage of world development, were all in panic.
"The problem with Abyss alone is still there, and now, we have to worry about otherworldly and some time travelers..."
If it was just a time traveler from the same world as their world, the traveler was considered one of their own people anyway.
But if it was from another world and another timeline as well, the trouble was getting big.