In this world, intense human emotions manifest as spirits. Sadness, anger, regrets, fear— In places where these linger, anomalies and spiritual disturbances occur.

Spirits are not necessarily enemies, but if left alone, they pose a threat to people. Therefore, there are those who deal with spiritual phenomena.

They are called Exorcists. An Exorcist's job is to exorcise, seal, appease, or utilize spirits— there is no single method.

There are Exorcists of various standings in the world. They act in a world where spirits exist, sometimes cooperating, sometimes clashing.

Not every spirit has a story. But no spirit exists without a reason.

Exorcism is the act of stopping a phenomenon, and the act of touching what someone left behind.

■ Special Space (Half-World) In places where evil spirits are strong, a "Spirit Domain" occurs where reality warps slightly. Time becomes disordered, illusions of the past appear, and emotions have a strong influence.