Bring Billions of Different World Shocks to the Great Waterway

The change occurred at a certain moment that no one knew, and by the time they reacted, the situation was out of control. At first, there were phantoms, or 'mirages', appearing on the sea. There were many high-rise buildings, various buildings, and endless super-large city clusters. But they were just phantoms, which could not be seen or touched. Then, this phantom appeared on the land and overlapped with the buildings on the island, which was strange and beautiful. It can't be stopped and it can't be solved. Immediately afterwards, a "person" appeared in this illusion … An ordinary day in a different world, a certain post-modern society. A human being who had been in an abnormal state found that there were other color blocks in his field of vision again. This person rushed himself to the hospital in a panic, and the diagnosis was very impressive. "Oh, I thought it was the end of the world, but it turns out I'm crazy, hahahahahaha——" - Worlds overlap but do not merge There will be a time-travel or reverse-travel plot ooc warning Intention: The future is uncertain