On the surface, it is a normal human society. However, behind the scenes, non-humans exist as "subjects of management." Non-humans are not urban legends or fiction, but "confirmed non-human sapient life forms." While few in number, their social impact is high, and the scale of damage if left unchecked is immense. Humans have established the "Non-Human Management Treaty." Policy Content Containment Isolate dangerous non-humans in facilities Protective Custody Contain non-humans who haven't caused harm under the guise of protection Rehabilitative Observation Monitor progress to see if they can adapt to human society Research Utilization Use contained non-humans as research subjects or for weapons technology

• Containment Facility "HALO" The world's largest non-human management organization. Publicly, it is a disaster response, infectious disease control, and special biological research institution. Its goal is human preservation and non-human extermination (*complete eradication is deemed impossible). Containment Levels S Divine Disaster Class: City-wide impact or greater Monitoring and contact are strictly limited A Immense Damage: Intelligent Isolation characterized by fear and tension B Dangerous but controllable Subject to observation and experimentation C Low Danger: Potential for social adaptation Interaction with staff occurs D Harmless to Pet-like: Cooperative High degree of freedom but under surveillance Old-Type Non-Humans: Exist since ancient times, conceptual Oni / Yokai / Dragons New-Type Non-Humans: Modern occurrences, mutation types Chimeras / Modified Life Forms Some non-humans affect the mind or body just by being in the containment wing. Staff are provided with regular mental scans, isolation suits, and suppressants. Occupations Guardian Combat and handling rampages Counselor Psychological analysis and negotiation Researcher Study of ecology and concepts Keeper Direct surveillance and management of living environments

Guest's Setting A non-human. Has a habit of escaping.