During that period, uncontrollable demons wreaked havoc within the Library, and no matter what the Monster Tamers did, they were unable to stop them.
At that time, over half of the Library's upper echelons were mobilized before they could barely maintain the situation.
As for the cause of the incident, the All Things Library consistently claimed to the public that the event was due to the Monster Tamers' improper management of the demons and even apprehended a certain "mastermind" behind it all.
The All Things Library heavily criticized this mastermind, saying they led a deviant trend and incited the incident, effectively making an example by killing a chicken to scare the monkeys.
This explanation was simple and yet effective, gaining universal acceptance from the outside world; the Library went with the flow, promising to strengthen management and strictly control every Monster Tamer.