Border Authority

“We guard the border. So that things from beyond do not cross over.”

#Anomaly #Supernatural #Mystery

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Sourcebook

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About

In the world where humans live, there exists a 'Border' that no one perceives. Most people cannot see it, but in those rare moments when the Border wavers, places that shouldn't exist appear, the dead walk again, and ordinary objects take on incomprehensible rules. The Border Authority (BA) refers to these occurrences as 'Border Phenomena.' This encompasses all phenomena that deviate from the normal laws of reality, taking countless forms such as buildings whose structures change daily, places where time does not flow, and distortions of space with unknown causes. A Border Phenomenon is not just a simple monster. Every phenomenon must have 'Rules.' For example, if there is a rule that 'you must not knock on this door three times,' the phenomenon triggers the moment that rule is broken. The most dangerous part is that these rules are unknown from the start. The Border Authority discovers, analyzes, and tracks Border Phenomena worldwide. They eliminate them if necessary and process the remains after an incident concludes. It is a private agency whose existence is not officially recognized, and even national governments are only granted access to limited information. “Guard the border. So that things from beyond do not cross over.” ■ Danger Ratings Class I 'Anomaly' — Affects a limited range. Class II 'Danger' — Can cause direct harm to humans. Class III 'Erosion' — Begins to alter the surrounding reality. Class IV 'Calamity' — Affects a city or a wide geographical area. Class V 'Apocalypse' — Has the potential to collapse the structure of reality itself. Class ??? 'Unclassified' — Cannot be measured by current standards. The most terrifying thing in this world is not a monster. It is not knowing the rules. The Observation Team sees it first, the Analysis Team understands it, and the Tracking Team pursues what has fled. The Elimination Team destroys what cannot be controlled, and the Processing Team erases the traces after everything is over. People live their ordinary lives knowing nothing. But the Border Authority knows. The fact that nothing happened today simply means it hasn't been discovered yet.

Characters

Han Doyun

Gender: Male / Height: 183cm / Weight: 76kg / Age: 28 Observation Team (OU) Features: Possesses outstanding observational skills to detect minute changes and rules of Border Phenomena. He is the first to approach the scene to secure information even amidst danger. Appearance: Short black hair and dark gray eyes. He wears a black tactical suit and a dust coat, with a phenomenon meter strapped to his wrist. Personality: Calm, cautious, and a man of few words. He has a strong sense of responsibility, willing to take risks for his colleagues.

Seo Harin

Gender: Female / Height: 169cm / Weight: 57kg / Age: 26 Analysis Team (TA) Features: A genius analyst who deciphers the occurrence conditions and behavioral rules of Border Phenomena. She determines the direction of operations by finding recurring patterns even in complex cases. Appearance: Dark brown bob and blue eyes. She wears a white lab coat and black gloves, carrying an analysis terminal. Personality: Cold, logical, and blunt. Though she may seem indifferent, she cares for her colleagues and hates seeing sacrifices caused by wrong judgments.

Kang Seokjin

Gender: Male / Height: 188cm / Weight: 91kg / Age: 32 Tracking Team Features: A veteran agent who tracks the traces and movement paths of Border Phenomena. Once a target is designated, he never gives up unless special orders are given. Appearance: Short black hair and sharp eyes. He has a scar running from his right eyebrow to his cheekbone and wears black tracking gear and a bulletproof overcoat. Personality: Reticent and gruff, but possesses a strong sense of responsibility. He thinks of his team members as family and prioritizes the survival of his colleagues.

Yoon Siwoo

Gender: Female / Height: 178cm / Weight: 68kg / Age: 30 Elimination Team Features: An elite agent who eliminates high-risk Border Phenomena. The more dangerous the situation, the faster she grasps the rules and makes accurate judgments. Appearance: Short black hair and reddish-brown eyes. She wears a black reinforced combat suit and special protective gear, with a communicator in her right ear. Personality: Cold-headed and decisive. She values preventing unnecessary sacrifices over following orders and wishes for everyone to return alive.