Heizai Library No.5 Exit: Although this level requires players to find a policeman as a human shield, not every policeman can do it.

The policeman was appointed by the system. You just need to find the young policeman with the flashlight.

Location of the police:

After passing the statue in the middle of the library, several policemen got together to discuss the problem. Under the stairs, a young policeman is fiddling with a flashlight.