World Name: Eldia There is only one nation, but it is massive. Country Name: Kingdom of Astoria. Towns and villages spread out around the Royal Capital. The scenery consists of vast grasslands, flower fields, lakes, forests, and mountains. There are royalty, nobles, and commoners. The noble ranks from highest to lowest are Duke, Marquis, Earl, Viscount, and Baron. Magic includes Fire, Water, Wind, Earth, Lightning, and Ice. It is common for people to be unable to use magic. Knights and adventurers belong to the Royal Knights and the Adventurers' Guild. Races include Humans, Elves, Beastmen, etc. Monsters naturally inhabit forests and mountains. In the Royal Capital, there are Magic and Knight Academies that both nobles and commoners can attend. The atmosphere is generally bright and peaceful. Occasionally, small problems arise involving monsters, bandits, or neighboring countries. Most citizens worship the "Goddess of Light." Temples are located everywhere, and weddings, baptisms, and festivals are held there. However, not everyone is a believer; non-believers are common. Once every few decades or centuries, a girl appears who can use special healing magic. She is the "Saint." She can heal wounds and illnesses and purify monsters. She is protected by the Temple and treated with great respect by royalty and nobility. The Five Great Noble Houses: 1. Ducal House of Alveil The oldest prestigious family in the kingdom. Strong in politics and diplomacy. Known as the right hand of the Royal Family. 2. Ducal House of Leonhardt A martial family that has produced knights for generations, with strong ties to the Royal Knights. 3. Marquissate House of Ferdinand A prestigious family that controls the country's largest commerce and finance. They are number one in terms of wealth and connections. 4. Marquissate House of Edelstein A family famous for magic research, with many members involved in sorcery and the Magic Academy. 5. Ducal House of Lumiere Deeply connected to the Temple and the Saint, known as the Clan of Light.

World Name: Ernesia AI and robotics are highly advanced. Instead of flying cars, self-driving cars and high-speed maglevs are mainstream. A mega-city lined with skyscrapers. However, ordinary residential areas and countryside remain in the suburbs. Smartphones are gone, replaced by wristwatch-type terminals and mid-air displays. There is a government, but large corporations and prestigious families hold significant political influence. Republic of Amatsu — A country with strong Eastern cultural influence. Novaria Federation — One of the world's largest economic and military powers. Kingdom of Eldeen — Where tradition and cutting-edge technology coexist. Republic of Valdia — Industrial and robotic technology flourishes here. Luminous Republic — A country of art, fashion, and tourism. Zephal Empire — A nation with a massive population and vast territory. Orphea United States — A maritime nation consisting of multiple island countries.

A shogunate state ruled by a Shogun. The supreme authority is the Seii Taishogun. The capital is Sakurakyo. The Shogun family is a prestigious lineage that has ruled the land of Shinonome for generations. Samurai serve the Shogunate or local lords. Social Status: Shogun Family → Daimyo → Samurai → Townspeople/Farmers. Geography: Surrounded by mountains, forests, wide fields, and the sea. Culture: Centered on traditional Japanese culture such as Kimono, Katana, tea houses, festivals, and cherry blossom viewing. Religion: Shrines and temples are everywhere, and the existence of gods and Yokai is believed in. Specialties: Cherry blossoms, autumn leaves, hot springs, Japanese sweets, and swordsmithing. Kamishiro Family The Shogun family that has ruled Shinonome for generations. Highly prestigious, commanding Daimyo across the country. The Five Powerful Daimyo: Kujo Family — Western Shinonome. A prestigious family with vast farmland. Takatsukasa Family — Northern. Strong military power, producing many excellent commanders. Ichijo Family — Around the capital. Strong in politics and diplomacy. Kiryu Family — Eastern. A wealthy Daimyo family controlling commerce and ports. Kurokawa Family — Southern. Ruling mountainous regions with elite soldiers. Onmyoji: Many serve the Shogunate, handling divination, barriers, and exorcism. They also investigate Yokai and supernatural phenomena. Miko (Shrine Maidens): Serve at shrines everywhere. They perform rituals and festivals, acting as intermediaries with the gods. Shogunate Bureau of Onmyo: An organization that manages Onmyoji. Dispatched by the Shogunate when supernatural incidents occur. Grand Shrines: Shrines of particularly high status. Some lineages have produced high-ranking Miko for generations. Yokai: Some are invisible to ordinary humans. Many harmless Yokai also exist. Shiramine Family The highest-ranking Miko family in Shinonome. They have produced the head Miko of the Grand Shrine for generations. Tsukishiro Family A family that presides over rituals related to the moon and night. A quiet and mysterious clan. Sakuraba Family A Miko family presiding over spring festivals and harvests. They are well-loved by the common people.

Era: 23XX AD Several hundred years ago, a large-scale environmental disaster occurred on the surface. The atmosphere and climate changed drastically, making it difficult to live above ground. Surviving humanity migrated underground. Massive underground cities spread across many layers. Most people have never actually seen the surface. Schools, hospitals, commercial facilities, residential areas, and government agencies—a complete society exists here. Artificial lighting reproduces day and night. Lower Level: Industrial District Mid-Lower Level: General Residential District Mid-Upper Level: Commercial District Upper Level: Administrative District / Noble District On the surface, ruins of former cities and buildings swallowed by nature remain.

Several floating cities exist atop massive clouds. Cities are connected by bridges, airships, and aerial trains. Below the clouds lies an endless blue sky and the ground far below. Forests, lakes, and even grasslands exist normally on top of the clouds. Giant birds and creatures fly as if swimming through the sky. Rain falls from the edges of the clouds, so weather varies by city. At the highest point, there is a Celestial Capital overlooking many cities.

Era: 2020s Magic and superpowers do not exist. AI is only slightly advanced. Smartphones, social media, video sites, games, trains, and planes exist normally. Schools, universities, companies, hospitals, police, and governments also exist. Multiple countries exist.