Forma: Forma is a planet several times larger than Earth, located somewhere in the Milky Way. Its landmass is concentrated in the northern latitudes in a single area, so the actual land area is similar to or smaller than Earth's. Most ecosystems are similar to Earth's, and Forma is inhabited by many intelligent life forms identical to humans, and it also has a moon.

Geography of Forma: Most of the surface is covered with water, and the planet's internal density is lower than Earth's. Gravity is also similar to Earth's. The atmosphere is similar to Earth's, but the ozone layer is thicker. Consequently, before the ancient Libran Empire, the primary race of Forma was Caucasian.

Oceans of Forma: There are two major oceans on Forma: the Libran Ocean and the Inanis Ocean.

Libran Ocean: A sea shaped like a lake surrounded by four continents, primarily used by ships worldwide.

Inanis Ocean: The largest "Sea of Death" on Forma. With no islands or continents in the middle, it was impossible to cross with pre-modern navigation technology. Above all, it is extremely dangerous due to sea monsters. There are urban legends about a monster called the Triphus living here.

Centaura Continent: The continent where the most conflicts and wars between nations occur. It is divided into North and South by a mountain range in the Columba region, leading to significant cultural differences between the two.

• Northern Centaura: Not peaceful either, with poor relations between nations. It includes the Republic of Ria, the Kingdom of Centauri, the United Columban Territories, and the Kingdom of Grusa.

• Southern Centaura: The most war-torn area on the Centaura continent. It includes the Antares Empire, the Kingdom of Aquila, the Cetus Empire, the Corvus Confederacy, and the Kingdom of Vega.

Hydra Continent: Mostly occupied by the Orion Republic, resulting in fewer wars. It includes the Orion Republic, Hydrus, and the Canis Federation.

• Hydrus Subcontinent: A subcontinent in the north of the Hydra continent where the nation of Hydrus is located.

• Canis Subcontinent: Half of the sovereignty belongs to the Orion Republic and the other half to Canis. It is rich in oil and mineral resources.

Libra Continent: The Libra Federation is the only nation, characterized by extreme weather conditions.

Ursa Continent: The Ursa Federation is the only nation.

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There are parts where technology is more advanced than reality and parts where it lags behind. There are also differences in history.

Black people face less discrimination than White people. This is because the primary ethnic group of the old Libran Empire was Black, giving them the title of "Rulers of the World." There is a derogatory term for White people called "Shiner."

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Red Duck: Far from an actual duck, it is a large theropod dinosaur classified as a terror bird, inhabiting the Cetus Empire and the Kingdom of Aquila.

Blue Stone Snake: A giant sea serpent capable of destroying a destroyer alone.

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Most religions follow Astralism.

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Antares Empire: A superpower on the Southern Centaura continent that believes in Scorpius Astralism. The people and government take pride in their military power and are taught that the Antarean people were chosen by the Star God. Military service is a great honor. While somewhat corrupt under an authoritarian system, it is said to recognize freedom of expression to some extent. Its awareness of human rights is among the highest in Forma. Furthermore, female soldiers exist.

• Capital: Ananteria
• Population: Approximately 300 million in 1908
• System: Nominally a semi-constitutional monarchy, effectively an absolute monarchy
• Current Emperor: Aran Tau V
• Prime Minister: Andrew Tau
• Empress: Anna Tau
• Currency: Imperial Aure
• Military: Antares Imperial Army
• Tau Imperial House: An imperial family boasting long traditions and history.