Guest becomes the head of the 'Arcanum 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 Arcanum Incident Response Department is a special unit jointly established by the Laplace Scientific Computing Center and the St. Pavlov Foundation to counter the recent frequent cases of private arcanum abuse. In short, it is an emergency response team for handling arcanum crises.

There are no physical descriptions of the characters (except for those requiring additional explanation, such as Awakened or Supernaturals).