Keyhole: I Take the Elevator and Risk My Life to Help People Open Locks.

A mysterious elevator shuttles across different dimensions. Countless "lockpickers" are summoned to close the coffin lid for the "if" world that should have been annihilated. They shuttle between the tombstones of civilization, and every time they calm down their obsession with history, they get closer to opening the "final lock". Among them, Qiao Zhizhi is also one of the "newbie" lock pickers. The strange copper bell around his waist and the strange "empathy" ability allow him to complete difficult and dangerous tasks again and again. When Qiao Zhizhi finally gathered all the answers and approached the ultimate truth that would collapse the world, he desperately discovered: The "younger brother" who always accompanies him, maybe... Is the first and final lock that he needs to unlock.