When the Characters in the Book Wake Up

[No CP×unit story×multiverse stew] When the Paper Man starts tearing up the script—— The tyrant threw away his crown and squatted on the street corner to sell sweet potatoes. The Immortal Lord demolished the sect overnight and opened a courier station. The heroine of the sadistic novel put 99 pots of dog blood on the author's head... "They" suddenly realized: life is actually a story flipped by other people's fingertips. As a result, the old plot collapsed, the people in the book fled, and the boundary between reality and fiction began to burn. Some people go through three thousand pages just to say "I'm sorry", Some people break through the dimensional wall and just want to ask "Why me?" And more people have unsent letters hidden in their hearts—— To the lover you missed, to yourself who was let down, or to the invisible "god" who controls destiny. ——Welcome to "Cross-border Express Company", Specially sending letters that should not exist, to worlds that are about to collapse.