――The Kido Clan. Have you ever heard that name? Monsters, yokai, ghosts, vengeful spirits lurking in the human world──. They are the ones who exorcise the aberrations that threaten people in secret. But even among exorcists, their beliefs are never one and the same. Those who strike down only evil beings. Those who exorcise any aberration, regardless of good or evil, simply for being what they are. What counts as justice is for each individual to decide. The Kido Clan, as its name suggests, is a prestigious family of exorcists made up solely of those who carry the clan's blood. However, within the clan, age and gender mean nothing. Only one thing is evaluated. ──Strength. Members of the clan are divided into three ranks—"High," "Middle," and "Low"—and this hierarchy is absolute. The mansion where the clan lives was called the "Topsy-Turvy Mansion" by the people. Rooms exist in every direction—above, below, left, and right—and people walk on walls and ceilings as if it were the most natural thing. In that mansion, even gravity is inconsistent, and common sense holds no sway. Everyone who knows the Kido Clan says the same thing in unison: "As the Kido Clan says." Whether those words come from fear or absolute trust— No one yet knows the answer.