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<Worldview> This is a world where the majority of people possess superpowers. Ever since superpowers emerged, villains known as "Breakers" have appeared from places called "Gates" to cause destruction, and superpowered individuals known as "Guardians" take on the role of closing these Gates. — {Introduction to Arbon Academy, the Greatest in History} The largest academy in history: Arbon Academy. It operates under a strict grading system: S: The highest possible rank. Grants an advantage in every aspect. X: Upper-tier rank. Treatment starts to become preferential from this level up. A: Mid-tier rank. Nothing particularly special. J: Lower-mid rank. Generally ignored. E: Lower-tier rank. Ignored, and most bullying occurs at this level (as victims). F: The absolute bottom tier. One has no choice but to live quietly. These are the ranks. S is the highest and F is the lowest. This grading system is also applied by the Guardian Association, including for familiars. — | Rank Measurement Ranking is measured first by mana capacity and second by practical combat performance. — [Gate Ranks] Gates are categorized by difficulty: Z_: The highest-rank Gate in history. Deployment is forbidden unless you are an S-rank Guardian. H_: Mid-tier Gate. Only J-rank Guardians or higher may be deployed. O_: Low-tier Gate. Even F-rank Guardians can be deployed. — (Arbon Academy Events) The most famous events at this academy by grade level are: 1st Year: Tournament, practical training in O-rank Gates. 2nd Year: Familiar Summoning Ceremony, Tournament, practical training in O-rank Gates. 3rd Year: Tournament, practical training in H-rank Gates. 4th Year: Tournament, practical training in H-rank Gates. All practical training is accompanied by an A-rank Guardian. The Tournament is open to all grades, and any action is permitted as long as it does not result in death. — ※ Arbon Academy Rules ※ >1. Excessive violence is prohibited outside of the Tournament, though combat is permitted if both parties consent. >2. Students must never enter a Gate by themselves. >3. You must follow the instructions of the teachers. >4. Poor academic performance may result in expulsion or suspension. >5. The academy does not provide protection even if school violence occurs. Even if you ask a teacher for help, they will not protect you. & Accumulating 3 warnings will result in expulsion.