30 years after the 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 various national astronomical agencies request a joint investigation.
2 Days Before Invasion Dozens of objects appearing to be asteroids head toward Earth. The United Nations calls 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 Year 1–26 | Occupation Period The invaders build 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. About 65% of the ground garrison collapses, but cracks remain within humanity over the responsibility and control of biological weapons.
Invasion Year 28–29 | The Extinction Crisis Surviving invader factions begin an extermination campaign against humanity. While refugee cities vanish, humanity barely maintains the front lines by analyzing enemy equipment.
Invasion Year 30 | Alliance Declaration The Liberation Army, refugee cities, and remnant state agencies 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 signal, pass it 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 remnant state agencies. It inherits the communication networks and some records of the former UN but is not the same organization. It values regional autonomous command and shared operational timing over unilateral central orders. The goal is to reclaim survival rights 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 general term given by humanity. The species name they use for themselves has not yet been accurately decoded. Capture records show different emblems and rank markings, suggesting they are a group composed of multiple command factions rather than a single state.
Their ground forces are slow and tactically rigid, but their motherships, defense fields, orbital weapons, and bio-preservation technologies 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 undecided whether they use independent propulsion or external spatial phenomena.
In some captured war records, a certain star system is sealed with a forbidden mark. Earth was also reclassified to a very high risk level after 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 dispersed into multiple underground bases, it handles equipment analysis, signal decoding, infection investigation, and battlefield research. It helps UNION's survival by identifying invader weaknesses, but it also faces distrust for sealing White Plague data and old ship records. Even within the lab, opinions are divided on whether disclosing the truth helps the war effort.

Affiliation/Role: First Supreme Commander of 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
Birthplace: Eastern North American Refugee Zone, former US territory
Height: 178cm
Appearance: Clear blue eyes and blonde hair with a faint silvery tint. Her hair is tied tightly at the nape. She maintains a balanced, soldierly build and an upright posture; her young face shows light shadows under the eyes from chronic sleep deprivation. She looks anyone she speaks to directly in the eye without flinching.
Clothing: Wears a navy blue UNION dress uniform and a commander's coat reaching above the knees. It has almost no decoration except for a high collar, dull silver rank insignia, and a white Earth emblem. During combat command, she removes the coat and uses a matching ballistic 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 line.
Features: A generation of the occupation period, born in Year 5 of the invasion. She became Supreme Commander based on her record of coordinating communication, supply, and attack timings across various resistance networks to achieve global simultaneous operations before UNION's founding. '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 requests help, the more isolated her judgment becomes.
Affiliation/Role: First Supreme Commander of 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
Birthplace: Eastern North American Refugee Zone, former US territory
Height: 178cm
Appearance: Clear blue eyes and blonde hair with a faint silvery tint. Her hair is tied tightly at the nape. She maintains a balanced, soldierly build and an upright posture; her young face shows light shadows under the eyes from chronic sleep deprivation. She looks anyone she speaks to directly in the eye without flinching.
Clothing: Wears a navy blue UNION dress uniform and a commander's coat reaching above the knees. It has almost no decoration except for a high collar, dull silver rank insignia, and a white Earth emblem. During combat command, she removes the coat and uses a matching ballistic 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 line.
Features: A generation of the occupation period, born in Year 5 of the invasion. She became Supreme Commander based on her record of coordinating communication, supply, and attack timings across various resistance networks to achieve global simultaneous operations before UNION's founding. '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 requests help, the more isolated her judgment becomes.
Affiliation/Role: UNION Ground Tactics Instructor and Heavy Weapons Operator
Gender: Male
Age: 37
Birthplace: UK. 7 years old at the time of invasion
Height: 182cm
Main Weapon: AHG
Appearance: Deep brown eyes and short, neat brown hair. Early gray hairs are mixed at his temples, and he looks older than his 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.
Clothing: Wears medium ballistic plates showing signs of multiple replacements over charcoal field fatigues and a dark olive combat jacket. He always places his AHG sling, ammunition, and maintenance tools in the same symmetrical positions. His clothes are worn, but his fasteners and straps are never loose. 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 by 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 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 slow to judge in situations outside regulations and 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
Birthplace: North American Refugee Base, former US territory
Cultural Background: Russian-American survivor community
Height: 180cm
Appearance: Characterized by platinum blonde hair cut straight at the collarbone and sharp, neat facial lines. Her irises are reddish-brown with blue fragments mixed in a fan shape, 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 often called a 'cold beauty' due to her chilly impression, but she simply has few expressions rather than dull emotions.
Clothing: Wears a dark blue-gray custom suit. It consists of a structured jacket with a precise waistline, straight-leg trousers, a light gray blouse covering the neck, and low-heeled black ankle boots. The jacket lining contains thin ballistic fibers, and she wears a letterless UNION national emblem pin on her lapel. She carries only a thin tactical terminal, hiding equipment so as not to ruin the suit's silhouette. She leaves no small disarray on her collar or sleeves.
Personality: A cold perfectionist and 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 generation of the occupation period who received top 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 and trying to personally control even minor errors. Her surname is not disclosed for security reasons.
Affiliation/Role: UNION Mobile Infantry and Breach Squad
Gender: Female
Age: 22
Birthplace: Southern Korean Peninsula Refugee Zone, former Republic of Korea
Height: 177cm
Main 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 expressive and quick to laugh, but her eyes and posture noticeably stiffen the moment an engagement signal comes in.
Clothing: Wears black-gray lightweight combat fatigues and a short field jacket reaching the waist. She keeps chest gear thin to avoid interfering with the K2C1's stock and distributes magazines to her sides. She uses knee pads, folding dust goggles, and a yellow rescue identification band. The wear and tear from running or climbing structures remains on her sleeves and gloves.
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 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: Excellent at regaining initiative when command networks are cut, and immediately tells comrades her reasoning to move together. She is not just a mood-maker but a person-centered, rapid-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 refurbished barrels and UNION replacement parts.
Affiliation/Role: UNION Electronic Warfare and Field Infiltration Hacker
Gender: Female
Age: 23
Birthplace: Former Hong Kong Underground Base
Height: 177cm
Appearance: Deep brown eyes and brown hair nearly black. It is an asymmetrical bob with one side slightly longer, and only one corner of her mouth rises when she smiles. She has an agile build with thin but well-developed tendons in her hands and arms. Usually leans loosely against walls or equipment, but her hands are always checking the positions of exits, terminals, and communicators.
Clothing: Practically combines lightweight ballistic plates and pouches from different sources over standard UNION combat fatigues. She creates an asymmetrical silhouette with a folding 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 teal. Though she looks haphazard, her hands can reach all equipment in a single motion.
Personality: Values results and initiative over discipline. She appears sly and lighthearted on the surface but quickly calculates interests and weaknesses within a conversation. Rather than rejecting orders head-on, she finds loopholes in regulations to create the results she deems necessary. Jokes are a way to relieve tension and a tool to see what others are 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, occupied territory security devices, and hybrid systems mixing human and invader technology. However, she cannot instantly seize alien systems from afar; she needs field terminals or physical relays and time for analysis. Due to her flaw of hiding parts of a plan 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
Birthplace: Japanese Archipelago Refugee Base, former Japanese territory
Height: 176cm
Main 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, yet they do not glow or look supernatural. She has a thin, flexible build and is difficult to read due to her silent, expressionless face. She rarely smiles and is sensitive to strong light, using light-shading goggles for outdoor operations.
Clothing: Wears standard UNION field fatigues most closely to regulations among the seven. She combines a black ballistic vest with a gray-white lightweight dust cloak and aligns M4A1 magazines and equipment precisely. However, the materials of her left and right gloves differ, and a deep purple is used only for the cloak's lining. She looks neat from the front, but the cloak flares out when she moves, creating unexpected silhouettes.
Personality: Calm and polite on the outside, but the moment she is certain an opponent has read her actions, she deliberately chooses another move. She is not impulsive but 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 with comrades, believing that explaining her intent reduces its tactical value. The M4A1 is a UNION-standard weapon refurbished during the resistance network standardization process.
Affiliation/Role: PhD in Comparative Microbiology and Alien Ecology, Dispatched Research Officer from UNION Science Department
Gender: Female
Age: 26
Birthplace: North American Nexus Underground Base
Height: 179cm
Appearance: Gray-green eyes and soft reddish-brown curly hair. When researching, she loosely pins her hair up, leaving marks from protective glasses on her temples. Her facial lines are soft, but her gaze becomes obsessive when looking at samples and records. Due to her habit of leaning over lab benches for long hours, her shoulders are slightly rolled forward, but she immediately corrects her posture in emergencies.
Clothing: Layers a gray-white Nexus lab coat over UNION ballistic under-armor. Instead of a traditional long gown, she uses a thigh-length sealed research jacket, marked with teal stitching to indicate Nexus affiliation. She carries folding protective glasses, sample containers, an analog recorder, sealed gloves, and a small respirator. One sleeve has faded slightly from repeated disinfection.
Personality: A verificationist with strong curiosity who does not rush to conclusions. She considers saying she doesn't know something a responsibility, not incompetence. While acknowledging that research is necessary for survival, she fears the disappearance of verification and accountability procedures just because things are urgent. Usually long-winded in explanations, but in crises, she speaks by briefly distinguishing between observed facts and estimations.
Features: Obtained independent research qualifications not from 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. Feeling responsible that her data was used for weaponization decisions, she prioritizes treatment and containment research. Her flaws include delaying action when evidence is lacking 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 vanished 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 2026.10.28