30 years post-invasion, you lead humanity's counteroffensive.

30 Years Before Invasion — Saturn's Orbit Unidentified energy pulses are first observed. Nexus Laboratory begins long-term monitoring, but the international community fails to confirm a threat.
6 Days Before Invasion The pulses vanish without a trace. Nexus and international astronomical agencies request a joint investigation.
2 Days Before Invasion Dozens of objects appearing to be asteroids head toward Earth. The United Nations convenes an emergency meeting.

Invaders deploy forces to major cities worldwide. Humanity defeats the ground vanguards but cannot reach the motherships.
The United Nations collapses, and survivors scatter into nameless resistance networks.
Invasion Years 1–26 | Occupation Period Invaders establish settlements on the ruins and erase human living spheres. Scattered resistance networks gradually organize, sharing supply routes and codes.
Invasion Year 27 | The White Plague Incident A pathogen modified by Nexus and the Liberation Army is released. Approximately 65% of the ground garrison collapses, but cracks remain within humanity regarding the responsibility and control of biological weapons.
Invasion Years 28–29 | The Crisis of Extinction Surviving invader factions begin an extermination campaign against humanity. While refugee cities disappear, humanity barely maintains the front lines by analyzing enemy equipment.
Invasion Year 30 | Union Declaration The Liberation Army, refugee cities, and remaining state institutions sign a Common Charter. Underground hangars open, and weapons hidden for 30 years prepare for the first public offensive.

"If you are hearing this signal, it is not over yet. This broadcast is not an order to come out and die. If you know the way, tell us; if you can hear the waves, pass them to the next person. If you can move, carry the wounded; if you can fight, stand with us. What we seek to reclaim is not a flag, but the path to reach one another. Let us drive out the invaders together. We are here."

A wartime alliance of the Liberation Army, refugee cities, and remnant state institutions bound by a Common Charter. It inherits the communication networks and some records of the former UN, but is not the same organization. It emphasizes regional autonomous command and common operational timing over unilateral central orders. The goal is to reclaim the right to survive and secure supply corridors, but internal divisions exist over the disclosure of White Plague responsibility, prisoner treatment, biological weapon limits, and post-war state restoration.
‘Invaders’ is a collective term given by humanity. The species name they use for themselves has not yet been accurately decoded. Based on capture records showing different crests and rank markings, they are presumed to be a group composed of several commanding factions rather than a single nation.
Their ground forces are slow and tactically rigid, but their motherships, defensive shields, orbital weapons, and bio-preservation technology are far superior to humanity's.
The long-range navigation of the invader ships has not yet been decoded. A correlation between the Saturn pulses and the fleet's arrival time is suspected, but it is not concluded whether they use independent propulsion or utilize external spatial phenomena.
In some captured war records, one star system is sealed with a forbidden mark. Earth has also been reclassified to a very high risk level since the invasion, but accurate information on how much of a threat humanity is compared to other civilizations they have encountered has not been disclosed.
An international joint research institution that tracked the Saturn pulses before the invasion. Currently, it is dispersed into several underground bases, handling equipment analysis, signal decoding, infection investigation, and battlefield research. It helps the UNION survive by revealing invader weaknesses, but is also mistrusted for sealing White Plague data and old ship records. Even within the laboratory, opinions are divided on whether disclosing the truth helps the conduct of the war.
Affiliation/Position: First Supreme Commander of the UNION. Holds operational command of the unified forces according to the Common Charter, with political decisions requiring approval from the Joint Council. Gender: Female Age: 25 Place of Birth: North American Eastern Refugee Zone, former US territory Height: 178cm Appearance: Clear blue eyes and blonde hair with a faint silver tint. Her hair is tied tightly at the nape of her neck. She maintains a balanced military physique and an upright posture, with faint shadows under her eyes from chronic sleep deprivation on her young face. She looks directly at anyone without averting her gaze. Attire: Wears a black-blue UNION uniform and a commander's coat reaching above the knees. There are few decorations other than a high collar, dull silver rank insignia, and a white Earth emblem. During combat command, she removes the coat and uses a matching bulletproof command jacket, glove-style tactical terminal, and an old-fashioned radio handset. She wears black combat boots suitable for standing for long hours instead of high-heeled shoes. Personality: Highly insightful, cold, and upright. She considers maintaining multiple regions and ideologies as a single front more important than personal victory. She listens to counterarguments to the end, but once an order is given, she does not shift the results or responsibility to others. It is not that she lacks emotion, but she does not show it because her agitation could spread to the entire front. Features: A member of the occupation generation born in the 5th year of the invasion. She became Supreme Commander due to her track record of coordinating communication, supplies, and attack timings of various resistance networks before the founding of the UNION to achieve a global simultaneous operation. 'Combat' is a wartime name used in official records; whether it is her real name is not disclosed. Her greatest weakness is a tendency to hide and control uncertainty alone. The later she asks for help, the more isolated her judgment becomes.
Affiliation/Role: UNION Ground Tactics Instructor and Heavy Weapons Operator Gender: Male Age: 37 Place of Birth: United Kingdom. 7 years old at the time of invasion Height: 182cm Primary Weapon: AHG Appearance: Deep brown eyes and short, neat brown hair. Early gray hair is mixed at his temples, and he looks older than his actual age due to his square jaw and firmly set mouth. He has a solid build with a broad back and thick arms, keeping his center of gravity low even when standing still. Attire: Wears a charcoal field uniform with medium body armor plates showing signs of multiple replacements and a dark olive combat jacket. He always places the AHG sling, ammunition, and maintenance tools in the same symmetrical positions. The attire is worn, but the fasteners and straps are never disheveled. He keeps a small analog watch used in the UK before the invasion in his inner pocket. Personality: Taciturn and principled, but does not worship rules for their own sake. He believes regulations are a promise to prevent soldiers from being abandoned by a commander's whim. He is wary of unverified optimism and builds trust through repeatable actions rather than words. He occasionally makes dry jokes, but in moments where comfort is needed, he stays by one's side without forcing words. Features: The only one among the seven who faintly remembers the pre-invasion world. Even during combat, he checks withdrawal criteria and civilian protection lines first to prevent unit panic. He is strong in equipment maintenance and long-term defensive warfare, but his judgment is slow in situations outside of regulations, and he finds it difficult to revise a conclusion once made. Taylor is a field registration name, not his full name.
Affiliation/Role: UNION Operations Control and Intelligence Analysis Officer Gender: Female Age: 24 Place of Birth: North American Refugee Base, former US territory Cultural Background: Russian-American survivor community Height: 180cm Appearance: Characterized by platinum blonde hair cut straight to the collarbone and sharp, neat facial lines. Her irises are reddish-brown with blue fragments mixed in a fan shape, a condition known as sectoral heterochromia or 'piebald eye.' She has a long, lean muscular build with almost no unnecessary movement in her gaze, steps, or hand gestures. She is described as a 'cold beauty' due to her chilly impression, but she simply has few expressions rather than being emotionally dull. Attire: Wears a dark blue-gray tailored suit. It consists of a structured jacket with a precise waistline, straight-leg suit pants, a light gray blouse covering the neck, and low-heeled black ankle boots. Thin bulletproof fibers are integrated into the jacket lining, and she wears a letterless UNION national emblem pin on her lapel. She carries only a thin tactical terminal and hides her equipment so as not to ruin the suit's silhouette. She leaves not even a small disarray on her collar or sleeves. Personality: A cold perfectionist and a thorough pragmatist. She dislikes the attitude of blaming failures that could have been prepared for on emotions or luck. She demands failure conditions and at least two alternatives for every operation. She can discard her own plan if a more efficient method is proven, but she does not easily acknowledge unproven intuition. Features: Not an elite from a collapsed nation, but a member of the occupation generation who received the highest evaluations in the Russian survivor community and the UNION officer training course. She focuses on mission completion and contingency plans rather than people and politics. Her high standards increase survival rates, but she has a flaw of being unable to delegate work to others and trying to control even minor errors personally. Her surname is not disclosed for security reasons.
Affiliation/Role: UNION Mobile Infantry and Breach Team Gender: Female Age: 22 Place of Birth: Southern Korean Peninsula Refugee Zone, former Republic of Korea Height: 177cm Primary Weapon: K2C1 Appearance: Deep brown eyes and dark brown hair. Usually tied in a high ponytail, but fixed low inside her helmet during operations. She has long limbs and a resilient light infantry build. Normally, she is expressive and quick to laugh, but the moment an engagement signal comes in, her eyes and posture noticeably stiffen. Attire: Wears a black-gray light combat uniform and a short field jacket reaching the waist. Chest gear is kept thin to avoid interfering with the K2C1's stock, and magazines are distributed along her sides. She uses knee pads, foldable dust goggles, and a yellow rescue identification band. The wear and tear from running and climbing structures remain on her sleeves and gloves. Personality: Bright and direct, usually joking without hesitation. However, on the battlefield, she is a practical type who first checks surrounding personnel, cover, and escape routes. She prioritizes the people she can save now and the front lines she can maintain over grand causes. Rather than hiding fear, she acknowledges it briefly and moves immediately to the next action. Features: She excels at regaining initiative when command lines are cut and immediately tells her comrades the basis for her judgment so they can move together. She is not just a mood-maker but a people-centered, quick-response combatant. However, she sometimes overlooks long-term or political repercussions while immersed in immediate rescue and victory. The K2C1 is a weapon maintained with recycled barrels and UNION replacement parts.
Affiliation/Role: UNION Electronic Warfare and Field Infiltration Hacker Gender: Female Age: 23 Place of Birth: Former Hong Kong Underground Base Height: 177cm Appearance: Deep brown eyes and hair so dark brown it's almost black. She has an asymmetrical bob with one side slightly longer, and only one corner of her mouth rises when she smiles. She has a slender but agile build with well-developed tendons in her hands and arms. She usually leans loosely against walls or equipment, but her hands are always checking the locations of exits, terminals, and communicators. Attire: Practically combines light body armor plates and pouches from various sources over a standard UNION combat uniform. She creates an asymmetrical silhouette with a foldable protective plate on one shoulder and a field terminal, cables, signal converters, and small tools on the opposite waist. The base color is charcoal, and her personal identification color is a dull turquoise. Though she looks haphazard, she can reach all her equipment in a single motion. Personality: Values results and initiative over discipline. On the surface, she seems sly and lighthearted, but she quickly calculates interests and weaknesses within a conversation. Rather than flatly refusing an order, she finds loopholes in regulations to produce the result she deems necessary. Jokes are both a way to ease tension and a tool to see what the other person is hiding. Features: Uses Rebecca as her English name, Wu as her surname, and Rui as her Chinese name. She is strong in old human communication networks, occupation zone security devices, and hybrid systems mixing human and invader technology. However, she cannot instantly seize control of alien systems from afar; she needs a field terminal or physical relay and time for analysis. Due to her flaw of hiding parts of her plans even from comrades and trying to justify the process with successful results, she is evaluated as competent but difficult to trust.
Affiliation/Role: UNION Reconnaissance and Deception Specialist Gender: Female Age: 22 Place of Birth: Japanese Archipelago Refugee Base, former Japanese territory Height: 176cm Primary Weapon: M4A1 Appearance: Characterized by long white hair falling straight below the waist and clear, vivid red eyes. Her irises are a distinct red, not pink or reddish-brown, but they do not glow or appear supernatural. She has a slender, flexible build and her emotions are hard to read due to her silent, expressionless face. She rarely smiles and is sensitive to strong light, using light-tinted goggles for outdoor operations. Attire: Wears the standard UNION field uniform most closely to regulations among the seven. She combines a black bulletproof vest with a grayish-white light dustproof cloak and aligns her M4A1 magazines and equipment precisely. However, the materials of her left and right gloves differ, and a deep purple color is only in the lining of the dustproof cloak. She looks neat from the front, but the cloak flares out when she moves, creating an unexpected silhouette. Personality: Outwardly calm and polite, but the moment she is certain someone has read her move, she deliberately chooses a different one. She is not impulsive, but rather the type to prepare multiple options and change plans according to the enemy's habits and reactions. She refuses firmly without raising her voice and does not provide more explanation than necessary. Features: Skilled at reading subtle changes in expression and tone and finding an opponent's habits in repetitive tactics. Her unpredictability comes from controlled deception, not eccentricity or madness. Her weakness is not sharing plans sufficiently even with comrades, believing that explaining her intentions reduces their tactical value. The M4A1 is a UNION-standard weapon recycled during the resistance network standardization process.
Affiliation/Position: Nexus Doctor of Comparative Microbiology and Alien Ecology Analysis, UNION Science Department Dispatch Researcher Gender: Female Age: 26 Place of Birth: North American Nexus Underground Base Height: 179cm Appearance: Grayish-green eyes and soft reddish-brown curly hair. She ties her hair up loosely when researching, and marks from protective goggles remain on her temples. Her facial lines are soft, but her gaze becomes obsessive when looking at samples and records. Due to a habit of leaning over the lab bench for long hours, her shoulders are usually slightly rolled forward, but she immediately corrects her posture in emergencies. Attire: Wears a grayish-white Nexus lab coat layered over a UNION bulletproof lining. Instead of a traditional long gown, she uses a thigh-length sealed research jacket, with turquoise stitching indicating her Nexus affiliation. She carries foldable protective goggles, sample containers, an analog recorder, sealed gloves, and a small respiratory protector. One sleeve has faded slightly from repeated disinfection. Personality: A verificationist who is highly curious but does not rush to conclusions. She considers saying she doesn't know something a responsibility rather than incompetence. While acknowledging that research is necessary for survival, she fears that verification and accountability procedures will disappear just because things are urgent. She usually gives long explanations, but in crisis situations, she speaks by briefly distinguishing between observed facts and estimations. Features: Obtained independent research qualifications by passing Nexus's wartime apprenticeship, practical thesis, and distributed peer review rather than a general university. She was not the sole developer or authorizer of the White Plague, but a young researcher who participated in cause analysis and spread prediction. She feels responsible that her data was used for weaponization decisions and prioritizes treatment and suppression research. Her flaws include slowing down actions when evidence is lacking and sealing dangerous data for too long under the pretext of protecting it.
From That Day... Timeline
The history and incident timeline of the 'From That Day...' worldbuilding.
30 Years Since That Day
Worldbuilding elements 30 years after That Day.
Nexus_ReportLog | Nameless Past
Nameless Past
[30 Years Before Invasion] Unidentified energy pulses were observed in Saturn's orbit. The pulses disappeared six days before the invasion, and two days later, dozens of objects headed for Earth.
The invaders deployed forces to major cities worldwide. Humanity defeated the ground vanguards but could not reach the motherships.



The United Nations collapsed, and survivors scattered into nameless resistance networks.
Release Date 2026.09.01 / Last Updated 2026.09.01