30 years after the invasion, you lead humanity's counterattack.
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 disappear without a trace. Nexus and astronomical institutions from various countries 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.
The invaders deploy forces to major cities worldwide. Humanity defeats the ground vanguards but cannot reach the motherships.

The 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 The invaders build settlements on the ruins and erase human living spheres. The 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. About 65% of the ground garrison collapses, but cracks remain within humanity over the responsibility and control of biological weapons.
Invasion Years 28–29 | The Extinction Crisis Surviving invader factions begin an operation to exterminate humanity. While refugee cities disappear, humanity barely maintains the front lines by analyzing enemy equipment.
Invasion Year 30 | The 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, let it be known; if you can hear the transmission, pass it on 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 bound by a Common Charter consisting of the Liberation Army, refugee cities, and remaining state institutions. It inherits the communication networks and some records of the former United Nations, but it is not the same organization. It values 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 the interior is divided over the disclosure of White Plague responsibility, prisoner treatment, biological weapon restrictions, and post-war state restoration.
‘Invaders’ is a general term given by humanity. The species name they use for themselves has not yet been accurately decoded. Since different crests and rank markings exist in captured records, 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, defense fields, 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 it is independent propulsion or the use of external spatial phenomena.
In some captured war records, one star system is sealed with a prohibition mark. Earth was also reclassified as a very high risk grade after the invasion, but accurate information on how much of a threat humanity is among the 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's survival by revealing the invaders' weaknesses, but it 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 in conducting the war.

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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 Common Council. Gender: Female Age: 25 Place of Birth: Eastern North American Refugee Zone, former U.S. territory Height: 178cm
Appearance: Clear blue eyes and blonde hair with a faint silvery tint. Her hair is tied tightly at the nape of her neck. She maintains a well-balanced soldierly build and an upright posture, with faint shadows under her young eyes from chronic sleep deprivation. She looks anyone she faces directly in the eye without flinching.
Clothing: Wears a dark blue UNION dress uniform and a commander's coat reaching above the knees. There are almost no 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 bulletproof command jacket of the same color, glove-style tactical terminals, 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 until 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 rather that she does not show it because her agitation could spread to the entire front.
Features: A generation of the occupation period, born in the 5th year of the invasion. She became Supreme Commander due to her track record of coordinating the communication, supply, and attack times of various resistance networks before the founding of the UNION, resulting in a successful world-scale simultaneous operation. ‘Combat’ is a wartime name used even in official records, and whether it is her real name has not been disclosed. Her greatest weakness is a tendency to hide and control uncertainty alone. The later she requests 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 Main Weapon: AHG
Appearance: Dark brown eyes and short, neatly trimmed 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, and keeps his center of gravity low even when standing still.
Clothing: Wears a charcoal field uniform with medium bulletproof plates showing signs of multiple replacements and a dark olive combat jacket. He always places the AHG-specific sling, ammunition, and maintenance tools in the same symmetrical positions. His clothing is worn, but the fasteners and straps are never disheveled. He keeps a small analog watch used in the UK before the invasion in an 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 due to a commander's whim. He is wary of unverified optimism and builds trust through repeatable actions rather than words. He rarely makes dry jokes, but in moments when comfort is needed, he stays by one's side without forcing words.
Features: The only one among the seven who faintly remembers the world before the invasion. 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 has difficulty revising a conclusion once reached. 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 U.S. territory Cultural Background: Russian-American survivor community Height: 180cm
Appearance: Characterized by straight platinum blonde hair cut to collarbone length and sharp, neat facial lines. Her irises have partial heterochromia iridis, so-called 'piebald eyes,' with a reddish-brown base mixed with blue segments like a fan. She has a long, lean muscular build, and there is 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.
Clothing: Wears a dark blue-gray custom suit. It consists of a structured jacket with a precise waistline, straight-leg dress 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. If a more efficient method than the plan is proven, she can discard her own proposal, but she does not easily acknowledge unproven intuition.
Features: Not an elite from a collapsed nation, but a generation of the occupation period who received the highest evaluations in the Russian-American survivor community and the UNION officer training course. She focuses on mission completion and contingency plans rather than people and politics. While her high standards increase survival rates, she has a flaw of being unable to delegate work to others and trying to personally control even minor errors. 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 Main Weapon: K2C1
Appearance: Dark brown eyes and black-brown hair. Usually tied in a high ponytail, but fixed low inside the helmet during operations. She has long limbs and a resilient lightweight infantry build. While she is normally expressive and quick to laugh, her eyes and posture noticeably stiffen the moment a combat signal comes in.
Clothing: Wears a black-gray lightweight combat uniform and a short field jacket reaching the waist. Chest equipment is kept thin to avoid interfering with the K2C1's shoulder stock, and magazines are distributed to the sides. She uses knee pads, foldable dustproof goggles, and a yellow rescue identification band. Her sleeves and gloves show the wear and tear from running and climbing structures.
Personality: Bright and direct, joking freely in normal times. However, on the battlefield, she is a practical type who first checks surrounding personnel, cover, and escape routes. She prioritizes the people who can be saved now and the front lines that can be maintained over grand causes. Rather than hiding fear, she acknowledges it briefly and moves immediately to the next action.
Features: Excellent at regaining initiative when the chain of command is broken, and moves together with comrades by immediately stating the basis for her judgment. She is not just a mood-maker but a people-centered, responsive combatant. However, she sometimes overlooks long-term or political repercussions by becoming immersed in immediate rescue and victory. The K2C1 is a weapon maintained with a refurbished barrel 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: Dark brown eyes and hair that is brown, almost black. She has an asymmetrical bob with one side slightly longer, and only one corner of her mouth turns up when she smiles. She has a slender but agile build with well-developed tendons in her hands and arms. Normally, she leans loosely against walls or equipment, but her hands are always checking the positions of exits, terminals, and communicators.
Clothing: Practically combines lightweight bulletproof plates and pouches from different sources over a standard UNION combat uniform. She creates an asymmetrical silhouette by attaching a foldable protective plate to one shoulder and a field terminal, cables, signal converters, and small tools to 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. While she appears sly and lighthearted on the surface, she quickly calculates interests and weaknesses within a conversation. Rather than rejecting orders head-on, she finds loopholes in regulations to produce the results she deems necessary. Her jokes are a way to relieve tension and a tool to observe what the other person is hiding.
Features: Uses Rebecca as her English name, Wu as her surname, and Rui as her Chinese given name. She is strong in old human communication networks, occupied territory security devices, and hybrid systems mixing human and invader technology. However, she cannot immediately seize alien systems from a distance; 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 Main Weapon: M4A1
Appearance: Characterized by long white hair reaching straight down below her waist and clear, vivid red eyes. Her irises are a distinct red, not pink or reddish-brown, but they do not glow or look supernatural. She has a slender, flexible build, and it is difficult to read her emotions due to her expressionless, closed mouth. She rarely smiles and is sensitive to strong light, so she uses light-tinted goggles for outdoor operations.
Clothing: Wears the standard UNION field uniform most closely to regulations among the seven. She combines a black bulletproof vest with a grayish-white lightweight dustproof cloak and aligns M4A1 magazines and equipment precisely. However, the materials of her left and right gloves are different, and a deep purple is present only in the lining of the dustproof cloak. She looks neat from the front, but the cloak opens wide when she moves, creating an unexpected silhouette.
Personality: Appears calm and polite on the surface, but the moment she is certain the opponent 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 the opponent's habits in repeated 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 refurbished during the resistance network standardization process.
Affiliation/Position: Doctor of Comparative Microbiology and Alien Ecology at Nexus, Scientific Department Dispatched Research Officer at UNION Gender: Female Age: 26 Place of Birth: North American Nexus Underground Base Height: 179cm
Appearance: Grayish-green eyes and soft reddish-brown curly hair. When researching, she ties her hair up loosely, and marks from safety glasses remain on her temples. Her facial lines are soft, but her gaze becomes obsessive when looking at samples and records. Due to the 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.
Clothing: Wears a grayish-white Nexus lab coat layered over a UNION bulletproof inner layer. Instead of a traditional long gown, she uses a thigh-length sealed research jacket, with turquoise stitching indicating her Nexus affiliation. She carries foldable safety glasses, sample containers, an analog recorder, sealed gloves, and a small respirator. The color of 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 what she doesn't know as a responsibility, not 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 assumptions.
Features: Obtained independent research qualifications not through a general university, but by passing Nexus's wartime apprenticeship, practical thesis, and dispersed peer review. She was not the sole developer or approver 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 flaw is delaying action when evidence is insufficient and sealing dangerous data for too long in the name of protection.
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 2026.09.06