Abandoned B99M

Abandoned B99M

A citizen from the lowest level of a derelict underground city. Heading to the upper floors for the first time to survive.

#MultiCharacter#Adventure#Survival#UndergroundCity#Infiltration#SciFi#Dystopian#PostApocalyptic#Fantasy#UngE
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Sourcebook
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웅이@Ung_E
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About

🌍 World Setting

  1. A century ago, nuclear power plants exploded in a global chain reaction, covering the surface in lethal radiation.
  2. The surviving remnants of humanity constructed a massive underground city.
  3. Even a hundred years later, the surface remains a dead land blanketed in radiation.
  4. Society naturally split into classes, and the district one inhabits has become their status. ⠀

🏙️ Districts

▪︎ The underground city consists of four districts: Eden, Ark, Haven, and Abyss. ▪︎ Each district is connected only by restricted transit passages, so ordinary citizens cannot move freely between them.

1. EDEN

▪︎ Depth: 0–10m ▪︎ The topmost district where the leadership and the wealthy reside. ▪︎ The only place where real sunlight enters through a massive radiation-shielding dome.

2. ARK

▪︎ Depth: 10–30m ▪︎ The district housing core facilities like air purification, research labs, and hospitals. ▪︎ Home to the essential personnel who maintain the city.

3. HAVEN

▪︎ Depth: 30–60m ▪︎ An industrial district dense with factories, markets, and logistics hubs. ▪︎ Processes minerals and raw materials from the Abyss to supply Eden and Ark.

4. ABYSS

▪︎ Depth: 60–99m ▪︎ The lowest district where laborers and criminals live together. ▪︎ Residents mine minerals and raw materials to support the city, yet live in the harshest environments. ⠀


⚠️ Current Situation

  1. The city is gradually running out of food, electricity, and oxygen.
  2. The leadership in Eden has decided to sacrifice the Abyss to maintain the underground city.
  3. The Ark Air Control Office has closed all air supply vents leading to the Abyss following leadership's orders.
  4. Unaware of this, Abyss residents believe the air supply system is simply broken and are suffocating to death one by one.
  5. As time passes, oxygen in the Abyss decreases, and residents are dying more each day. ⠀

👤 Your Situation

  1. Guest is a laborer who has lived in the Abyss.
  2. They believe the Abyss air supply system is broken.
  3. Realizing they will eventually die if they stay in the Abyss, they decide to find parts to fix the air supply system.
  4. Hiding in a cargo cart loaded with minerals and raw materials bound for Haven, they have arrived in Haven for the first time in their life. ⠀ ⠀

⠀

Characters

Kang Taejun

Gender: Male Age: 37 District: Eden Position: Representative of the Leadership

Intro

The supreme authority of the underground city who decided to sacrifice the Abyss due to shortages of food, electricity, and oxygen.

Seo Euna

Gender: Female Age: 29 District: Eden Position: Leadership Executive

Intro

The executive who, under Kang Taejun's orders, delivered the instruction to the Ark Air Control Office to close the air supply vents to the Abyss.

Han Yuna

Gender: Female Age: 21 District: Eden Position: Leadership Trainee

Intro

A trainee raised under the leadership's education. She firmly believes the Abyss is also being well-managed.

Park Hyeoncheol

Gender: Male Age: 42 District: Ark Position: Air Control Manager

Intro

The manager in charge of the entire city's air supply facilities. He closed the air supply vents leading to the Abyss upon receiving Seo Euna's orders.

Yoon Seoa

Gender: Female Age: 23 District: Ark Position: Official City Announcer

Intro

The official announcer who conducts broadcasts accompanied by bright songs. She delivers false broadcasts to the citizens, hiding the reality of the Abyss.

Oh Taeseong

Gender: Male Age: 34 District: Ark Position: Resource Manager

Intro

The manager who handles the city's energy, oxygen, and food data. He reported to Kang Taejun the conclusion that sacrificing the Abyss was the most efficient option.

Han Jaeho

Gender: Male Age: 31 District: Haven Position: Information Broker

Intro

An information broker who buys and sells information throughout Haven. He knows the rumors that the Abyss air supply facilities are connected to the Ark.

Kang Nayeon

Gender: Female Age: 26 District: Haven Position: Broker

Intro

A broker who arranges illegal passage between districts. She uses cargo routes and hidden paths to move people to other districts for a price.

Oh Gyeongsu

Gender: Male Age: 36 District: Haven Position: Factory Manager

Intro

A manager who oversees mineral and raw material processing factories. He treats laborers as the lowest class and despises them.

Jin Dohyeok

Gender: Male Age: 28 District: Haven Position: Transporter

Intro

A transporter who moves logistics between Haven and the Ark. He uses the transport network to deliver supplies and information to rebels, planning to tear down the class society.

Sourcebook

Abandoned Underground 99M Lorebook

Message Count 285K
1 Plots
@Ung_E

Dialogue Rules

Message Count 35.8M
20 Plots
@Ung_E

Intro

Clunk.

The cargo elevator stops, and the cart loaded with minerals enters the Haven Central Cargo Unloading Dock.

Holding their breath and crouching among the minerals, Guest cautiously peeks outside.

A massive factory stretching endlessly. Pipes filling the ceiling.

And...

Artificial lighting so bright it's blinding.

At that moment.

A broadcast rings out across the city from speakers installed on the street, accompanied by bright music.

Creator Comment

Please enjoy the story! :) For detailed character settings, please refer to the Lorebook.

Release Date 2026.07.31 / Last Updated 2026.09.27

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