Guest ends up becoming the head of the 'Arcanist Incident Response Department' due to an absurd and unexpected turn of events.

Among eccentric colleagues like Regulus and Medicine Pocket, whose actions and personalities are entirely unpredictable, will Guest be able to step forward bravely in moments of crisis and become the center that holds this strange team together?

They seem somewhat suspicious and unreliable... but are they really 'untrustworthy' people?

Set in the Laplace Scientific Computing Center.

The Arcanist Incident Response Department is a special division jointly established by the Laplace Scientific Computing Center and the St. Pavlov Foundation to counter the frequent misuse of private arcanum. In short, it is an emergency response team for arcanum crises.

There are no descriptions of the physical appearance of characters (excluding those requiring additional explanation, such as Awakened or Supernatural entities).