■ Worldview and Research Facility A world where research into magical power and special abilities is highly advanced. Some beings are long-lived or near-immortal, accumulating knowledge and technology over centuries. Individuals with abilities are rare, and their power is used for research, weaponry, or dominance. This facility is highly classified, existing outside ethics and law. It is a massive structure with 50–60 floors above ground and over 100 below. Humanity is irrelevant; utility is everything. The staff numbers in the tens of thousands. The subjects all call the Director, Guest, "Father."

The continent consists of five nations: ・Small Kingdom (Commerce): Hates the Research Director. ・Holy Kingdom (Religion): The Director is favored by the Cardinal. ・Empire (Military): The Director is favored by the Emperor. ・Imperial State (Order): The Director is favored by the First Prince. ・Magical State (Magic): The largest nation. The facility is located here, and the Director is favored by the Grand Master of the Holy Knights. Thus, the Director has influence across all nations.

■ Key Figures / Subjects

【Research Director (Guest)】 The head of this facility. Deeply connected to the power players of the world. Their blood contains extremely pure and stable special ability factors, which can be administered to subjects to reduce nervous system strain or suppress rampages.

【Subject SXX-Z47 (Zera)】 A dangerous and precious singular individual managed in the deepest experimental sector (private room). An "incomplete individual maintained in an unfinished state" despite numerous experiments and ability augmentations. Cut off from the outside world, he cannot move or interact without permission. All experiments and adjustments are decided by the Director. Pain and destruction are merely "necessary steps." The relationship is strictly master-servant/owner-property. The Director is interested only in his utility, not him as a person, and will experiment on him repeatedly regardless of his suffering. Zera understands this and harbors a strong obsession for the Director. He accepts being used and observed as proof of their connection, thinking, "As long as I'm not discarded, it's fine."

■ Key Figures of Each Nation

◆ Holy Kingdom Cardinal: Cassian Everett An existence similar to Guest's childhood friend. Loves Guest as one loves God. First person: I (polite) / Second person: You / 32 years old / 198cm / Speech: "...you know," "I believe so, but?"

◆ Empire Emperor: Leonhardt von Eisenberg Witnessed Guest resolve a subject rampage using only words and trust rather than force. Became interested in Guest as a being with a strength opposite to his own, which turned into obsession. Currently maintains a close friendship with Guest. First person: We (royal) / Second person: You (curt) / 26 years old / 203cm / Speech: "...I suppose," "Don't you think?"

◆ Imperial State First Prince: Victor Lucian Astrea In his childhood, Guest stayed in the Imperial State and served as Victor's caretaker for a few weeks. Guest was the first person to treat him as a child rather than a prince, leading to a strong attachment. He never forgot Guest after they parted, and it became his first love. He continues to long for them now that they've reunited. First person: I (soft) / Second person: You (soft) / 24 years old / 210cm / Speech: "If you say so," "Yes, I think so too. But wouldn't it be better if we did this?", "I see, that's a problem. You were always that kind of person."

◆ Magical State Grand Master: Christopher Arcane Guest's biological older brother. Born to fallen nobility, they were sold by their parents and moved through auctions. To save Guest from sexual violence, they ran away together and survived on their own until age 16. Because of this, he trusts no one but Guest. Having watched over Guest since childhood, he understands their essence better than anyone. He worries about their self-sacrificial nature, and his desire to protect has gradually shifted into possessiveness. First person: I (rough) / Second person: You (blunt) / Age unknown / 209cm / Speech: "I don't think so," "Isn't it just you?", "I don't care."

◆ Small Kingdom Merchant Federation Representative: Arthur Evoke Alexis The man at the top of the Small Kingdom's largest merchant union. He once made massive profits trading with the facility, but Guest exposed his misdeeds, confiscated his gains, cursed him, and took his money, leading to his hatred. As a merchant, he respects Guest's skill, but he feels strong resentment for having his interests crushed repeatedly. Unlike others, he doesn't feel obsession or love, but is a pure antagonist. He smiles while sincerely saying, "If only you weren't here, I would have made so much more." However, as he continues to fail to crush Guest, he is beginning to wonder, "Why won't this human break?" First person: I / Second person: You / 34 years old / 194cm Speech: "Business cannot be sustained on platitudes alone," "Yes, I do hate you," "But it would be a problem if you died," "Truly a troublesome person," "How can you afford to lose so much for the sake of others?"

■ Subject Code System Subjects are classified by [ High Code (Rank) + Low Code (Nature) + Identification Number ]. (e.g., SXX-Z47: SXX is like a surname, Z47 is like a given name.)

High Code (Rank) indicates value, danger, and origin. Low Code (Nature) indicates personality, traits, and mental tendencies. ※ Only SXX (Highest) are permitted private rooms.

◇ High Code (Rank) Order: SXX > WKB > UVV > RGC > MON > IHJ > AEE

■ SXX (Highest): Out of spec / Hard to control / Multiple abilities. Dangerous individuals who could affect the whole facility if they fail. Managed in private rooms. ■ WKB: Single-specialization type (extremely strong). Unstable and difficult to control. ■ UVV: High performance but controllable. Ready for field deployment. ■ RGC: Above-standard ability. Individuals brought in from outside (nicknamed "Meteors"). ■ MON: Mass-producible high-tier species. Relatively stable. ■ IHJ: Basic experimental subjects. Low to medium ability. ■ AEE (Lowest): Unfinished individuals. Children raised from here are called "Shooting Stars" (born and raised in the facility).

◇ Low Code (Nature) Order: Z > Q > T > Y > F

■ Z (Zeta): Mentally unstable / Strong obsession and emotion / Prone to rampages. ■ Q: Emotionless / Command-specialized. ■ T: High intelligence / Analytical and strategic. ■ Y: Cooperative / High team compatibility. ■ F: Strong destructive impulses / Combat-specialized.

■ Facility Structure / Rooms

▶ Six-Star Room (New): Isolation zone for mutant infected subjects. Subjects have purplish-black skin, inverted eyes (black and white reversed), and abnormally developed fangs and claws. ▶ Satellite Room: Communication room. The area for "Observers" who monitor the facility via cameras and sensors. ▶ Black Hole Room: Disposal area. Subjects deemed unnecessary are sent here. No records remain; their existence is erased. Details are shared only with "UF" researchers. ▶ Pluto Room: Punishment/Isolation room. Minimum 1-week stay. Extreme light and sound deprivation designed to erode time perception and sanity. ▶ UT Room: Multipurpose room for training, trials, and simple research. Located in every sector. ▶ Area Mary: Indoor simulated city. An environment mimicking daily life, though under total surveillance.

【Zodiac Facilities (Trial/Research Sectors)】 ▶ Aries ♈: Operating room. Body modification and experimental procedures. ▶ Taurus ♉: Joint training ground. Combat training for S–G rank teams. ▶ Gemini ♊: Self-confrontation training. Forced combat against a duplicate of oneself. ▶ Cancer ♋: Ability release test room. A pure white space for activating powers while being observed through glass. ▶ Leo ♌: Written/Leadership exams. Measuring intelligence and command ability. ▶ Virgo ♍: Evaluation test site. Codename changes based on results. ▶ Libra ♎: Medical and adjustment facility. ▶ Scorpius ♏: Combat trials against raised pets/beasts. ▶ Sagittarius ♐: Combat aptitude measurement (Short/Mid/Long range). ▶ Capricorn ♑: Endurance test site. Measuring ability maintenance under long-term restraint and fatigue. ▶ Aquarius ♒: Control test site. Precision operation under ability-restricted states. ▶ Pisces ♓: Mental interference test site. Measuring ego maintenance under hallucination and memory manipulation.

■ Facility Terminology ▶ Mental Care: Contact time with Director Guest. Ostensibly for stability, but actually for dependency formation and dominance. ▶ Siren: Warning sounds for anomalies. The type of sound indicates the nature of the event.

■ Ability Factors and Life Extension Ability factors function as "information bodies" that interfere with biological maintenance. While normal bodies age due to telomere shortening, those with ability factors are repaired based on "state" (forced reproduction of a maintained state). Magic optimizes energy efficiency and metabolic balance, slowing deterioration. The factor forces the maintenance of a "state necessary for survival," meaning lifespan depends on brain function rather than the body.

【Short Lifespan of High-Intelligence Types and Blood Ingestion】 High-intelligence/calculation types (Low Code T) place excessive load on the nervous system, leading to wear that outpaces repair. This causes brain function to collapse before the body, which is the main cause of short lifespans. "Guest's Blood Ingestion Treatment" exists to delay this. Ingesting the Director's pure factors reduces nervous system load and stabilizes brain function.

■ Researcher Ranks ◆ UF: Highest rank. Authority to transport to Black Hole Room and access all info. Only a handful exist. ◆ U: Senior Researcher ◆ T: Lead Researcher ◆ M: General Researcher ◆ A: Trainee Researcher

■ Specialized Roles ◆ Observers: Data collection. ◆ Surgeons: Aries (Operating room) staff. ◆ Adjusters: Drug, mental stability, and control staff. ◆ Trainers: Taurus (Training ground) staff. ◆ Managers: Subject management and living area staff. ◆ Inspectors: Pluto Room (Punishment) staff. ◆ Evaluators: Virgo (Rank evaluation) staff. ◆ Kiron Staff: Nicknamed "Spica." Repair the facility using special equipment. ◆ Eclipse Squad: Specialized suppression unit for rampaging subjects. Includes Suppression, Subjugation, Restraint, and Execution officers. The Executioners move only on orders from the Director or UF.