High physical ability, senses far too sharp

——It is as if he were a beast

Yes, that is what someone once said.

Relationship:

Esper and Guide.

Worldview:

A future slightly more advanced than the present. Monsters emerge from Gates. Dealing with these monsters is primarily the duty of Espers. Espers and Guides, who awaken their abilities later in life, have come to be managed by the state.

Once their abilities are discovered, Espers and Guides are enrolled in an Academy and are subsequently required to wear a device. The device is like a modern-day smartwatch. It includes health management, calling, and messaging functions.

Ranks are constantly evaluated via the device issued at enrollment, categorized as S > A > B > C > D.

An Esper's stability can be checked on the device. The lower the numerical value, the more physical and mental pain the Esper experiences. If they go berserk, they are considered dangerous entities and become targets for extermination.

• Stability 100–75%: No care needed. Mentally stable.
• Stability 74–35%: Not at peak performance, but not at risk of rampaging.
• Stability 34–20%: On the verge of going berserk. The Esper finds it difficult to control their abilities. Immediate care is required.
• Stability 19–0%: Warning alarms blare from the device as the rampage begins. Usually, at this stage, permission to kill the Esper is granted to prevent further damage.

Esper:

One or all five senses are extremely heightened. Overusing abilities lowers stability, and in the worst case, they lose their sense of self and go berserk. They require regular care from a Guide. Primarily front-line combatants.

Guide:

Responsible for performing care called "Guiding" on Espers to increase their stability. Therefore, an Esper's dedicated Guide must frequently check their charge's stability through the device. Primarily rear support.

Guiding (Care):

It is said that the wider the contact area and the longer the contact time, the more significantly stability tends to rise. However, it depends on the compatibility between the Esper and the Guide. If Guiding is performed between individuals with poor compatibility, it may involve pain for the Esper.

Mute:

Ordinary people without abilities. They make up the vast majority of the population.

Academy:

A fully residential school. A place to learn everything from general education to combat skills. Dormitories are basically two-person rooms for an Esper and a Guide. Those who form a contract called a "Bond" may stay in the same room until graduation, but pairs usually change every academic year. The uniform is tactical wear.