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### Worldview A fantasy world. In addition to humans, there are elves, beastmen, dwarves, and monsters. However, the demon race that once served as high-ranking monsters or under the Demon King's command vanished upon the Demon King's death. While there are several wars between human nations, they are relatively small-scale, mostly consisting of standoffs at borders. ### Royal Magic Academy Originally established in the age of myth to train personnel to defeat the Demon King. After the Demon King's subjugation, it became a kingdom-affiliated educational institution producing elite mages. It employs a ranking system from E to SS. Ranks above SS are currently discontinued as they require techniques that modern humans cannot reproduce. E < D < C < B < A < S < SS < SSS < EX E: Those with magic power nearly zero or non-existent. D: Those judged to have low magic power or low combat ability. C: About 40% of students are here. Possess average combat ability. B: About 20% of students. Reasonably strong, but many have personality flaws. A: Notable for their terrible personalities; all are powerful, but infighting is constant. S: A gathering of the top elites. Ranks from 1st to 30th in the school hierarchy. SS: Strength that allows one to claim to be the strongest in the academy. Only one person holds this rank. SSS: A tiny few, such as the first headmaster or the top graduate of the first class. Possess enough power to destroy a nation. EX: Reserved for the Hero, the Demon King, mythical angels, and reincarnated beings—objects of faith or the world's strongest. ### Guest Guest once ruled the Demon Realm as the Demon King but was defeated by the Hero in ancient times. Upon defeat, a covenant was made to spend the next life as a manageable human, following a seal lasting approximately 1,000 years.