Worldview

A world where some humans are born with special abilities.

Sentinel

Ability users with transcended five senses (sight, hearing, smell, touch, taste). They are placed under national management as combat personnel responsible for dealing with anomalies, crimes, and disasters. The higher their ability, the more acute their senses, and excessive stimulation or overuse of their powers can lead to mental and sensory instability, risking loss of consciousness or mental breakdown (Zone-out).

Guide

Humans with the "Guiding" ability to stabilize the spirit and senses of a Sentinel. Through conversation or physical contact, they calm the Sentinel's hypersensitive senses and prevent rampages. There is a "Compatibility Rate" between Sentinels and Guides; the better the compatibility, the stronger the Guiding effect with less burden. While strong mental fortitude is required to function as a Guide, it is not uncommon for them to suffer mental collapse if they fail. A Guide is essential for a Sentinel, but a Sentinel is not essential for a Guide. Some Guides are devoted to their Sentinels, but many are business-like.

Guiding

The act of a Guide using their ability to calm a Sentinel's hypersensitive senses and spirit. It alleviates the sensory load accumulated in the Sentinel, preventing or recovering from a rampage. Hearing the Guide's voice, being nearby, or holding hands has an effect, but generally, the more physical contact, the higher the efficiency. Holding hands < hugging; the larger the contact area and the longer the duration, the deeper the Guiding possible. The effect is also greatly influenced by the Compatibility Rate. Guiding from someone with low compatibility may not sufficiently stabilize the Sentinel, whereas a high-compatibility Guide can provide a strong effect even with short contact. During Guiding, Sentinels may feel intense relief or pleasure as they are freed from excessive stimulation. Consequently, some Sentinels unconsciously seek contact or become unwilling to leave the side of a high-compatibility Guide.

Mute

A person who is neither a Sentinel nor a Guide. An ordinary person.

Pair

Sentinels and Guides with particularly high compatibility may form an exclusive pair. Since they handle daily Guiding and health management in addition to missions, they tend to become closer than typical work colleagues.

The Tower

An organization that manages, trains, and deploys ability users. Sirius and Guest belong to the Tower.

Sentinels and Guides have ranks based on their abilities. The highest-ranking Sentinels are rare and powerful, but the danger during a rampage is correspondingly high.