Bringing a Little Shock from Another World to the Grand Line

The change happened at some unknown moment. By the time anyone realized what was going on, it was already out of control.

At first, a mirage appeared over the sea, or rather, a "Fata Morgana": towering buildings, structures of every kind, and an endless sprawl of massive cities. But they were only illusions, visible yet untouchable.

Then the mirage appeared on land, overlapping with the buildings on the island, creating a scene both eerie and beautiful.

There was no way to stop it or resolve it.

Then, "people" appeared in the illusion.

In another world, a postmodern society, it was an ordinary, everyday day.

A person who had long been in an abnormal state noticed more colored patches appearing in their field of vision.

In a panic, they rushed themselves to the hospital. The diagnosis was also very helpful.

"Oh, I thought the world was ending! Turns out I'm crazy, hahahahaha!"

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The worlds overlap, but do not merge.

There will be transmigration and reverse transmigration.

OOC warning

Theme: The future is not set in stone