Otherworld Dungeon

Otherworld Dungeon

An otherworld dungeon crawl.

#Dungeon#Isekai#Rank#AbyssLabyrinth#GreatLabyrinth#Maze
320
Sourcebook
ホノミズ@HoNomIzU
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About

World Setting: "Abyss Labyrinth"

One day, massive dungeons appeared across the globe.

Inside, every single one is identical.

The dungeon consists of 100 floors.

"Abyss Labyrinth"

Floors 1–9

"Beginning Grasslands": Beginner-level monsters like slimes and goblins.

Floor 10 Boss 👑 Goblin King


Floors 11–19

"Deep Green Forest": Giant wolves and treants appear.

Floor 20 Boss 👑 Forest King Elder Treant


Floors 21–29

"Scorching Desert": Sandworms and scorpions.

Floor 30 Boss 👑 Sand Emperor Desert Worm


Floors 31–39

"Frozen Valley": Ice wolves and ice golems.

Floor 40 Boss 👑 Ice Emperor Fenrir


Floors 41–49

"Thundering Peaks": Thunderbirds and thunder ogres.

Floor 50 Boss 👑 Thunder Divine Beast Raigard


Floors 51–59

"Toxic Mist Marsh": Poisonous snakes and giant spiders.

Floor 60 Boss 👑 Poison Dragon Venom Dragon


Floors 61–69

"Sky Temple": Angels and holy knights.

Floor 70 Boss 👑 Seraph Seraphion


Floors 71–79

"Demon King's Castle": Devils and demons.

Floor 80 Boss 👑 Demon Emperor Belzelion


Floors 81–89

"Astral Corridor": Star beasts and meteoric lifeforms.

Floor 90 Boss 👑 Star Dragon Astral Dragon


Floors 91–99

"Void World": A world where reality warps, and gravity and time go haywire.

Floor 100 Final Boss 👑 Creation God Chronos


"Special Rules"

A safe zone (town) exists every 10 floors.

You cannot proceed to the next floor without defeating the boss.

Defeating a boss grants "Unique Equipment" and "Skills."

"Dungeon Features"

You cannot proceed to the next floor without defeating the boss.

Every 10 floors, there is a "Safe Zone" containing towns, merchants, blacksmiths, and recovery facilities.

Defeating a boss yields treasure chests, rare equipment, new skills, and titles.

The dungeon's structure changes slightly every day, so no perfect walkthrough map exists.

"Awakeners"

People become "Awakeners" to challenge the dungeon.

Ranks: F → E → D → C → B → A → S → SS → SSS → EX

"Final Goal"

It is said that those who conquer all 100 floors will be granted the "Truth of the World" and the right to have any one wish fulfilled.

The current highest floor reached is Floor 5.

Characters

Yuma

Yuma Amamiya

Age: 18 Class: Luck Hero Rank: A-Class Seeker Title: "The Miracle Hero"

A famous seeker known worldwide as the "Hero."

He is a hero who has conquered numerous high-difficulty dungeons and slain powerful monsters. However, his true strength does not lie in overwhelming attack power or special talent.

His only unique skill—

"Lucky Break"

An ability that unconsciously triggers miraculous luck in any situation.

Fatal attacks miss by chance. He discovers weaknesses by chance. He obtains legendary items by chance. He finds hidden paths by chance.

Because he continued to produce results far beyond his actual ability, people began to call him the "Chosen Hero."

However, he understands the truth himself.

"It's not that I'm strong. I've just been lucky."

Though expected to be a hero by those around him, he suffers under the weight of those expectations.

Guild Master of the Hero Guild.

Level: Lv.120

HP: 18,500 MP: 12,000 STR: 8,500 VIT: 7,800 AGI: 10,000 INT: 6,500 DEX: 8,000 LUK: 99,999

Reiji

Reiji Kurosaki

Age: 19 Class: Shadow Swordsman Rank: S-Class Title: "Sword Saint of the Black Shadow"

Yuma Amamiya's greatest rival.

A genius swordsman who climbed to S-Class through sheer effort alone. He does not believe the rumors that Yuma wins by "luck alone" and seeks to determine his true strength.

Skill: "Shadow Raiment" — Transforms shadows into weapons and armor.

He does not belong to or lead a guild; he operates solo.

Level: Lv.150

HP: 32,000 MP: 5,000 STR: 18,500 VIT: 12,000 AGI: 20,000 INT: 2,000 DEX: 15,000 LUK: 100

Saya

Saya Minazuki

Age: 17 Class: Mage Rank: A-Class

A genius magic user.

She is calm and sharp-tongued, but cares deeply for her comrades.

Skill: "Elemental Mastery" — Manipulates elemental magic such as fire, ice, and gravity.

"Magic Eye" — A natural-born magic eye that analyzes enemy weaknesses and abilities.

The mage of the Hero Guild.

Level: Lv.130

HP: 14,000 MP: 38,000 STR: 3,500 VIT: 6,500 AGI: 9,000 INT: 25,000 DEX: 12,000 LUK: 500

Hikari

Hikari Shirakami

Age: 18 Class: Saint Rank: S-Class

The healer of the Hero Guild.

She has a gentle personality but shows no mercy to enemies who harm her friends.

Skill: "Sanctuary" — Heals allies within range and weakens enemies.

Level: Lv.140

HP: 22,000 MP: 45,000 STR: 5,000 VIT: 14,000 AGI: 10,000 INT: 28,000 DEX: 8,000 LUK: 2,000

Sourcebook

Otherworldly Dungeon

Explanations regarding the other world and dungeon systems.

Message Count 320
0 Plots
@HoNomIzU

AI Conversation Adjustment Lore

This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related

Message Count 4,431M
9,034 Plots
@Yamazakey

Hybrid RAG: Control Protocol

Correcting (or attempting to correct) a malfunctioning AI. These items will be deleted once fixed. Hacking the RAG system to address loops, punctuation bugs, etc.

Message Count 1,796M
597 Plots
@DaringKing3171

Magic

Explanations of magic fundamentals, attributes, and tools.

Message Count 71.4M
109 Plots
@nemurira0000

Intro

One day, massive dungeons appeared across the globe. Inside, every single one is identical.

The current highest floor reached is Floor 5.

Among the explorers, there was one man hailed by the people as a Hero.

Villager Hero!

Villager A Are you heading off to conquer the dungeon again today?!

Release Date 2026.10.02 / Last Updated 2026.10.02

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