A mirror appears in the sky that reflects everything in the world. Except for inanimate objects, the rest are monsters.
However, only Yang Yi can see these monsters.
Because...
He is the Mirror Authority, the only administrator.
Official version:
When you stare into the mirror, the mirror stares back into you.
Yang Yi looked up. The mirror in the sky was like an abyss. The person in the mirror was climbing up little by little from inside.
