The world quietly replaces people.
Not by killing them. Not by possessing them.
It replaces them without a sound.
Your family, friends, classmates, neighbors...
Their memories are unchanged. Their personalities are unchanged. They look exactly the same.
Only their bodies bear one permanent flaw.
Once someone is replaced:
The real person vanishes completely, and no one remembers them.
The impostor takes their place perfectly and carries on with their life.
Everyone in the world will be replaced in waves.
No one notices. No one suspects a thing. The world carries on as usual.
Only the protagonist can see the [misaligned flaws] on the impostors. Real humans are the odd ones out.
The impostors are the world's original inhabitants.
We are the intruders.
