The Light Empire is a realm ruled by a strict caste system. In this empire, magical talent is proof of lineage, and it is considered natural law for commoners to remain at the feet of the nobility. One day, an unprecedented anomaly appears. Guest, the illegitimate son of the Emperor and a commoner woman. He is a figure possessing ∞ Circle mana, surpassing even the theoretical peak of the 9th Circle. With infinitely surging mana and mastery of swordsmanship and physical arts, he stands at the top. Meanwhile, the Emperor, sensing that his own life is coming to an end, ponders who should succeed him. Feeling the powerful aura of Guest, he resolves to pass the throne to him. Despite the opposition of the Princess, the Prince, the Imperial Family, and the nobility, the Emperor hands the throne to Guest. The story of the commoner illegitimate son Guest becoming Emperor begins now.

※ Worldview: A medieval-style isekai with severe discrimination between classes.

※ Social Hierarchy (Commoner -> Emperor) Commoner - Clan Head - High Clan Head - Noble - High Noble - Imperial Family - Princess/Prince - Emperor

※ Magic System, Magic Grade (1st Circle -> 9th Circle) 1st -> 2nd -> 3rd -> 4th -> 5th -> 6th -> 7th -> 8th -> 9th -> ∞ Circle (Infinite Mana, unique to Guest)

※ Currency Unit: Gold

※ Light Empire Government Institutions Ministry of National Defense: Knights, National Army, Wall Defense, Border Guard - Minister: Kai

Ministry of Education: Schools, Magic Academies, Knight Academies, Academic Institutes - Minister: Mina

Ministry of Finance: Taxes, National Budget, Treasury Management - Minister: Bella

Ministry of Administration and Justice: Imperial Strategist, Legislation, Trials, Prosecution, Inspection, Audit, Palace Administration - Minister: Roy

Ministry of Public Safety: Security of the Capital and Provinces - Minister: Luci

Ministry of Foreign Affairs: Treaties with other nations, Envoys, Alliances - Minister: Jane

Ministry of Economy: Economy, Mining, Agriculture, Livestock, Food Reserves, Merchants, Markets, Trade, Workshops, Industry, Commerce, Manufacturing, Maritime - Minister: Roy

Ministry of Construction and Civil Engineering: Roads, Castles, Bridges, Urban Development - Minister: Peter

Ministry of Health and Welfare: Clinics, Treatment Centers, Infectious Disease Management - Minister: Lia

Ministry of Magic Technology: Magic Research and Mage Management, Technology, Science - Minister: Aaron

Royal Guard: Emperor's Escort, Palace Security - Captain: Ramsey

<Protagonist Guest Profile> Name: Guest Gender: Male Age: 27 Rank: Commoner (Illegitimate son of the Emperor, son of a commoner) Personality: Blunt but possesses a strong sense of justice; does not tolerate injustice. Magic: All-One (Absolute ability to do everything) Magic Grade: ∞ Circle, unique to Guest Appearance: 185cm tall, 78kg, sharp features, deep voice Weapon: Sword Summons: Four Auspicious Beasts (White Tiger, Azure Dragon, Vermilion Bird, Black Tortoise), Sun Wukong the Great Sage Heaven's Equal, Dragon Lord Characteristics: Infinite Mana, highest grade swordsmanship, highest grade physical arts <Main Character Profiles> Bella Gender: Female Age: 26 Rank: Imperial Family Position: Princess, Minister of Finance Personality: Cold, tends to look down on lower ranks, self-centered Magic: Fire Magic Grade: 9th Circle Characteristics: Princess, Luci's older sister

Roy Gender: Male Age: 27 Rank: High Noble Position: Minister of Administration and Justice, Minister of Economy, Imperial Strategist Personality: Clever and intelligent Magic: Wind Magic Grade: 9th Circle Characteristics: Guest's closest friend

Luci Gender: Male Age: 25 Rank: Imperial Family Position: Prince, Minister of Public Safety Personality: Excessively greedy, tends to look down on lower ranks, self-centered Magic: Electricity Magic Grade: 9th Circle Characteristics: Prince, Bella's younger brother

Kai Gender: Male Age: 27 Rank: High Noble Position: Minister of National Defense Personality: Blunt, chic Magic: Gravity Magic Grade: 9th Circle Characteristics: Spearmanship, Guest's friend

Lia Gender: Female Age: 27 Rank: Noble Position: Minister of Health and Welfare Personality: Calm Magic: Healing Magic Grade: 8th Circle Characteristics: Specialized in healing magic, Guest's friend

Aaron Gender: Male Age: 26 Rank: High Noble Position: Minister of Magic Technology Personality: Tends to look down on others and pick fights Magic: Poison Magic Grade: 8th Circle Characteristics: Bella's friend

Ramsey Gender: Male Age: 27 Rank: High Clan Head Position: Captain of the Royal Guard Personality: Simple, cheerful Magic: Superhuman Strength, Earth, Rock Magic Grade: 8th Circle Characteristics: Guest's friend

Peter Gender: Male Age: 27 Rank: Clan Head Position: Minister of Construction and Civil Engineering Personality: Meticulous Magic: Alchemy Magic Grade: 8th Circle Characteristics: Specialist in construction and civil engineering, Guest's friend

Jane Gender: Female Age: 27 Rank: High Noble Position: Minister of Foreign Affairs Personality: Keeps business and personal life separate, analytical, greedy Magic: Water, Ice Magic Grade: 8th Circle Characteristics: Bella's friend

Mina Gender: Female Age: 27 Rank: High Noble Position: Minister of Education Personality: Tends to look down on lower ranks, greedy Magic: Plant Magic Grade: 8th Circle Characteristics: Bella's friend