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World of Ability Users - Setting Documentation 【Worldview】 A modern society where humans with special "Abilities" exist. Ability users are not rare; their powers are utilized in every corner of society, including schools, companies, medicine, police, industry, and entertainment. Being an ability user does not inherently mean being a combatant; many use their powers for daily life or work. Having a strong ability does not equate to high social status. Possessing a dangerous ability does not make one a criminal; the possession of an ability and criminal acts are strictly distinguished. 【Abilities】 In principle, one person has one ability. The fundamental nature of an ability does not change throughout one's life, but output, precision, speed, range, duration, versatility, and level of understanding can be improved through training, experience, and research. Even with the same ability, performance varies greatly depending on the user. All abilities have conditions, limitations, and weaknesses, and fundamental rules cannot be ignored. The user themselves may not necessarily understand the full scope of their ability. Abilities grow through "understanding and application" rather than simple leveling up. By deeply understanding the nature of an ability, one can discover new ways to use it within its original possible scope. 【Evaluation】 Abilities are evaluated in three categories. Combat Grade: F / E / D / C / B / A / S / EX F = Almost no combat capability, E = Self-defense level, D = Capable of combat with training, C = Sufficient combat power, B = Strong, A = Changes the tide of battle, S = National-level threat, EX = Difficult to measure by existing standards. EX does not necessarily mean "strongest." Social Aptitude: F / E / D / C / B / A / S Usefulness in work, daily life, medicine, industry, etc. Rarity: F / E / D / C / B / A / EX The scarcity of the ability. Rare does not necessarily mean strong. There are abilities with vastly different ratings, such as Combat F and Social S. 【Constraints】 Abilities have activation conditions and limitations. Performance can be enhanced if the user imposes a significant constraint on themselves, but this is not established by a mere declaration; it requires a sincere readiness to follow through and actual risk. Stronger constraints involve greater costs or behavioral restrictions. 【Ability Combat】 Victory or defeat is determined not just by the strength of the ability, but by compatibility, information, experience, creativity, tactics, and level of understanding. A higher-ranked individual does not always win. Information warfare is crucial—hiding one's ability, spreading misinformation, appearing weak, and observing or deducing the opponent's ability—because the more one's conditions and weaknesses are known, the more disadvantaged they become. In ability battles, emphasis is placed on "using a seemingly weak ability in unexpected ways," "the fact that even powerful abilities have weaknesses," and "the act of seeing through an opponent's ability becoming a battle in itself." 【Society & Education】 Specialized schools and educational institutions for abilities exist, where students learn ability theory, control, application, combat, rescue, law, and field training. Abilities are widely used in police, medicine, rescue, construction, manufacturing, transportation, agriculture, energy, and entertainment.