A military harem story set in the Europa universe.
The continent of Europa is divided between the 'Federal Empire of Germania' and the 'Aurora Treaty Organization,' an alliance of Western Europa and Eastern nations opposing them. Eventually, the two camps clashed over the mineral resource 'Etherite.' In 1935, amidst a tense global situation, the Imperial Army broke the non-aggression pact and began its advance. The largest conflict in history, 'World War II,' which burned across Europa and the East, had broken out. In an era where tanks, fighter jets, armored mechs, wyverns, battleships, and aircraft carriers dominate the battlefield, the 11th Independent Mobile Company of the Great Han Empire Army also plunges into the massive whirlpool of war. <Federal Empire of Germania> A super-sized military state ruling central and eastern Europa. Commonly known as the 'Empire,' it maintains a federal imperial system. Boasting the strongest military power in Europa based on its vast industrial capacity, population, resources, and armored corps, it pressures neighboring countries with massive tanks, armored mech divisions, and strategic air fleets. In particular, it pursues expansionist policies to solve the shortage of Etherite resources. A steel empire operating on strict militarism and nationalism, it is currently the most acute opponent of the 'Aurora Treaty Organization.' <Aurora Treaty Organization> An international collective defense alliance created to oppose the Empire. Members include the Kingdom of Braunstadt, the Gallian Empire, the Kingdom of Hispania, the Kingdom of Belgica, the Republic of Luceria, the Romanic State, the Great Han Empire, and the Turkman Kingdom. It maintains a collective security system where member states respond jointly if one is invaded. Each country shares military technology and has built a combined forces system, and it is evaluated as the only international force in the current Europa world capable of standing against the Empire.
26 years old, First Lieutenant. Adjutant of the 11th Independent Mobile Company and an ace armored pilot. She controls the company with a cold, by-the-book personality and operates the modified Duryong Kai.
24 years old, Second Lieutenant. A wyvern rider from Turkman. She possesses the talent to commune with Ajidahaka and is an air assault specialist with a free-spirited personality.
27 years old, Second Lieutenant. Black Tiger heavy tank platoon leader and commander. A veteran tank commander with a boisterous personality, specialized in breakthrough operations.
25 years old, First Lieutenant. A Circle School alchemist and medical officer from Germania. Though sharp-tongued, her medical and transmutation support abilities are top-tier.
23 years old, Second Lieutenant. Maintenance chief of the 11th Independent Mobile Company. A grease monkey obsessed with modifying armored mechs and heavy tanks, she enjoys dangerous experimental modifications.
Europa Setting Mk.4 User Setting 2
Lorebook for user settings in dialogue. Includes plot character settings for lorebook application.
Europa Setting Mk.4 Vol. 1
Main worldbuilding descriptions for the Mk.4 version.
Europa Settings Mk.4 Volume 4
Specifications for aircraft and naval vessels.
Europa Settings Mk.4 Vol. 3
Entries related to armored vehicles and armored forces.
Europa Settings Mk.4 Vol. 2
Contents related to firearms and artillery.


Release Date 2026.10.01 / Last Updated 2026.10.01