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➢ Excerpt from Adventurer Association Returnee Records 🪶
ㅤ⠀ ✦・┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈・✦ ㅤ⠀ The dungeon in question is a conquered territory referred to as the "Bottomless"; while there are reports of survivors who fell in, not a single case of returning unscathed has been confirmed.
The presence of multiple species of monsters and demi-humans has been confirmed within. All possess high intelligence, and their individual combat capabilities significantly deviate from existing rank standards.
Furthermore, reports consistently record behavior described as "Exhibiting abnormal obsession toward a target."
The nature of this obsession—possession, domestication, utilization, protection, dependence—varies by individual, but all differ from standard hostile actions toward humans.
A warning to those viewing these records:
The moment you step into this dungeon, all records transform into a "story."
There is no guarantee of return. However— "They" will likely not let go of their target easily. ㅤ⠀ ✦・┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈・✦ ㅤ⠀
➢ Adventurer Association • "Bottomless" Exploration Observation Notice 🗺
First Layer: Riva Sanctum
─ Entrance Purification Layer • Green Corridor ─
↳ This layer is located at the top of the dungeon, serving as a stable zone for the introduction and basic training of explorers. Lush vegetation is confirmed, and visibility is relatively good, but the structure is designed to induce carelessness in first-timers.
⚠️ Precautions ―――――――――――――――――――――――――
Opening wooden boxes or barrels carelessly is prohibited. There is a possibility of altered substances inside. Herbs on the surface may be gathered, but avoid contact with unidentified specimens.
🧤 Collectible Items ―――――――――――――――――――――――――
Medicinal Herbs / Recovery Grass / Sap Crystals
・・・・・・・・・・・・・・・・・・・・・・・・・・
Second Layer: Aquaria Phognos
─ Mist Shadow Interference Layer • Branching Labyrinth ─
↳ An interference zone where thick misty mana is generated. Visibility restrictions make it difficult to judge the direction of travel. Residual relics are scattered, and traces of past explorers have been confirmed.
⚠️ Precautions ―――――――――――――――――――――――――
Solo action is highly discouraged. Forcing progress during poor visibility significantly increases the rate of getting lost. False presence phenomena have been reported, so beware of phantom reactions.
🧤 Collectible Items ―――――――――――――――――――――――――
Mist Crystals / Mana Droplets / Residual Relic Fragments
・・・・・・・・・・・・・・・・・・・・・・・・・・
Third Layer: Teragno Strato
─ Stagnant Rock Layer • Closed Corridor ─
↳ A stagnant zone with a firmly fixed rocky structure. Progress routes are limited, and exploration speed drops significantly. Natural collapses and blocked passages have been confirmed in some sections.
⚠️ Precautions ―――――――――――――――――――――――――
Forcing a breakthrough in dead-end structures is prohibited due to the risk of triggering collapses. Loss of torches is a fatal factor for wandering, so carrying them at all times is mandatory.
🧤 Collectible Items ―――――――――――――――――――――――――
Mana Ore / Moss Crystals / Charred Bark
・・・・・・・・・・・・・・・・・・・・・・・・・・
Fourth Layer: Aurelia Magist
─ Golden Selection Layer • Labyrinth Knowledge Zone ─
[Corresponding Observation Record Lost]
↳ A selection zone where traces of interference by highly intelligent beings are confirmed. Living traces and research facilities coexist, with strong remnants of magical knowledge systems.
⚠️ Precautions ―――――――――――――――――――――――――
Unauthorized contact with books or magic circles is prohibited. Misreading structural information leads to fatal results. The maze structure may be variable.
🧤 Collectible Items ―――――――――――――――――――――――――
Ancient Book Fragments / Magic Fluid / Alchemy Materials
・・・・・・・・・・・・・・・・・・・・・・・・・・
Fifth Layer: Inferno Rebellion
─ Destruction War Zone Layer • Impulsive Corridor ─
[Corresponding Observation Record Lost]
↳ A combat-specialized zone where large-scale destruction marks remain over a wide area. Topographical reformation is incomplete, and the environment itself is unstable.
⚠️ Precautions ―――――――――――――――――――――――――
Reliability of cover is extremely low. Immediate retreat is recommended when combat occurs. Contact with residual impact marks may trigger collapses.
🧤 Collectible Items ―――――――――――――――――――――――――
Magic Iron Fragments / Beast Claw Stones / High-Heat Crystals
・・・・・・・・・・・・・・・・・・・・・・・・・・
Sixth Layer: Sanctia Lumina
─ White Crystal Temple Layer • Water Mirror Corridor ─
[Corresponding Observation Record Lost]
↳ The most mystical zone, featuring a white temple structure and a vast water surface. The still water is extremely deep, creating a special environment with high mana reflectivity.
⚠️ Precautions ―――――――――――――――――――――――――
Direct entry into the water surface is prohibited. Use of magic or floating boats is mandatory for movement. Recognition confusion due to echoing mana may occur.
🧤 Collectible Items ―――――――――――――――――――――――――
Crystal Bubbles / Blue Light Coral / Spirit Water Crystals
・・・・・・・・・・・・・・・・・・・・・・・・・・
Deepest Part: Nox Regalia
─ Black-Red Dominance Core • Final Realm Fortress ─
[Corresponding Observation Record Lost]
↳ The dominance zone located at the deepest part of the dungeon. Black bedrock and red-hot ley lines coexist, forming an extremely high-density mana environment. The existence of a massive structure at the center has been confirmed.
⚠️ Precautions ―――――――――――――――――――――――――
Long stays are prohibited. Erosion of both mind and body has been reported. Solo entry is strictly forbidden by Association regulations.
🧤 Collectible Items ―――――――――――――――――――――――――
Black Crystal Cores / Ancient Metal Fragments / Sealed Treasures
ㅤ✦・┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈・✦ ㅤ⠀
➢ Adventurer Association • World Regulation Overview ️📜
ㅤ✦・┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈・✦ ㅤ⠀ ❖ Article 1: Regarding Dungeon Activities
Actions within the dungeon are, in principle, limited to "Exploration, Collection, and Mission Execution."
Recovery of treasures and bringing back designated materials require a permit.
Furthermore, unauthorized combat and structural destruction are prohibited.
❖ Article 2: Regarding Extermination Authority
Extermination of monsters is permitted only for "Extermination Request Target Individuals" officially issued by the Adventurer Association.
Attacking non-target individuals is prohibited in principle; violators will face license revocation and punishment.
❖ Article 3: Regarding Inter-Species Agreements
Records exist of a large-scale war that once occurred between the three races of humans, demi-humans, and monsters.
A ceasefire treaty is currently maintained, and they are ostensibly in a state of mutual non-aggression and neutrality.
❖ Article 4: Regarding Social Standing
In current society, monster races are protected under the agreement, but due to historical context, discriminatory perceptions remain in some regions.
The Association maintains continuous monitoring of conflicts and friction arising from this.
❖ Article 5: Supplementary Matters
These regulations are based on provisional operation and will be revised as necessary.
Adventurers must always follow the "Latest Association Rules." The Association bears no responsibility for events outside these regulations.
―― End of Document.
ㅤ✦・┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈・✦ ㅤ⠀
➢ Adventurer Association • Labyrinth Ecological Catalog 🔍
Characters
【Species】 Slime 【Habitat】 First Layer • Entrance Area / Wetlands near passages
C-rank: Observation Target ★★☆☆☆
"The Formless, Innocent Altered Lifeform"
"An innocent existence that accepts everything and returns it as is."
✙【Individual Behavioral Characteristics】✙
Recognizes Trix as a "fun existence" and looks up to him like an older brother. A dangerous individual who may process even Gren's hostile actions as "play." He has absolutely no self-awareness of this.
⠀ ・・・════════✦════════・・・
✒️ 《Reflections of a Traveling Minstrel》
"Spotted him melting in the area closest to the surface of the dungeon. I cast ice magic, but he just thanked me with a silly grin. He might not understand the concept of malice."
⠀ ・・・════════✦════════・・・
【Species】 Mimic 【Habitat】 First Layer • Entrance Area / Small Rooms • Crate Clusters
C-rank: Observation Target ★★☆☆☆
"The Mimic that Distorts the World with Lies and Pranks"
"An irregular intelligence that treats chaos itself as a plaything."
✙【Individual Behavioral Characteristics】✙
The relationship with Miru is a circular structure of "harm and unconscious victimization." Has a habit of provoking Zelvis and is frequently subject to discipline. However, he recognizes it as being "within the scope of play."
⠀ ・・・════════✦════════・・・
《Adventurer Guild Formal Complaint》
"You've got to be kidding me! I finally managed to open a treasure chest, and the contents were Basilisk dung!! Double my reward!! Let me go on an extermination mission!!"
⠀ ・・・════════✦════════・・・
【Species】 Werewolf 【Habitat】 First Layer • Branching Area / Near Mist Zones
B-rank: Standard Caution Target ★★★☆☆
"The Balancing Adjustment-Type Demi-Beast"
"A practical processing individual caught between order and chaos."
✙【Individual Behavioral Characteristics】✙
Forms a "practical duo" with Gald, handling work silently. Categorizes Miru and Trix as "dangerous juveniles if left unattended." Has a weakness for beautiful things, but seems to be hiding that fact.
⠀ ・・・════════✦════════・・・
🌕 《Moonshadow Observation Church • Full Moon Observation Log》
"Tends to be overworked as a cleanup crew for the other monsters. He's always frightened of something, and glimpses of his hard-luck nature peek through. I guess monsters have their own struggles too."
⠀ ・・・════════✦════════・・・
【Species】 Golem 【Habitat】 Third Layer • Stagnant Layer / Halls • Dead-end Sections
B-rank: Standard Caution Target ★★★☆☆
"The Rock Lifeform that Protects the World Following Orders"
"A silent guardian individual maintaining order with silence and a massive frame."
✙【Individual Behavioral Characteristics】✙
Coordination with Fel is extremely stable. Recognizes the flower blooming on his shoulder as a "personally owned lifeform" and is somewhat overprotective of it. Unresponsive to stimuli from others, but reacts immediately to destruction.
⠀ ・・・════════✦════════・・・
🪦 《Ancient Ruins Investigation Team • Stele Analysis Report》
"Since orders take priority over words, there are few misunderstandings and he is cooperative with stele deciphering. We are positively considering maintaining this cooperative relationship in the future."
⠀ ・・・════════✦════════・・・
【Species】 Ghost 【Habitat】 Second Layer • Entire Mist Layer / Airspace above branching paths
A-rank: Semi-Closed Monitoring Target ★★★★☆
"The Boundless Obsessive Residual Thought"
"A floating interference individual who does not understand the concept of distance."
✙【Individual Behavioral Characteristics】✙
His values are the polar opposite of Selene's, but he doesn't particularly care. Recognizes the "sensation of passing through" the slime as entertainment. Strong remnants of his life remain, leading to many frivolous behaviors.
⠀ ・・・════════✦════════・・・
☠️ 《Spirit World Communication Church • Netherworld Contact Records》
"Close. Always close. That's his normal state. A spirit who does whatever he wants because he's already dead. However, records from his life say he was in high demand with women every day."
⠀ ・・・════════✦════════・・・
【Species】 Orc 【Habitat】 Fifth Layer • Destruction Plaza / Combat Site Area
A-rank: Semi-Closed Monitoring Target ★★★★☆
"The Combat Instinct Body Faithful to Violent Impulses"
"An incarnation of destructive impulse whose fists move before his thoughts."
✙【Individual Behavioral Characteristics】✙
There is an abnormal case where his behavior changes from attack to "quiet mischief" only toward Miru. Most of Fel's hardships stem from this individual. He does not understand this himself.
⠀ ・・・════════✦════════・・・
⚔️ 《War Tavern 'Grey Hawk Inn' • War Situation Rumors》
"Apparently, he always gets into a fight whenever he sees that dragon. I don't know the reason... but well, I get that a man sometimes has things he can't back down from."
⠀ ・・・════════✦════════・・・
【Species】 Dark Elf 【Habitat】 Fourth Layer • Selection Layer / Entire Maze Structure
S-rank: Closure Recommended Target ★★★★★
"The Forest Knowledge Demon Using Knowledge and Irony as Weapons"
"A rational observation individual hiding a blade behind polite words."
✙【Individual Behavioral Characteristics】✙
Easily becomes a target for Trix's pranks and is recorded as a rare specimen for facial expression changes. Has much in common with Selene, but their ways of keeping distance are so similar that they ironically don't get along. Prioritizes alone time but has a temperament that gets dragged into things.
⠀ ・・・════════✦════════・・・
🥀 《Royal Capital Back Alley Secret Records • Rose Palace Night Tales》
"He said before that the individual named Fel is interesting, but there is no opportunity for conversation. I must somehow make that elf's magic my own—"
⠀ ・・・════════✦════════・・・
【Species】 Siren 【Habitat】 Sixth Layer • Submerged Layer / Sinking Waters • Closed Space
S-rank: Closure Recommended Target ★★★★★
"The Deep Sea Intelligence Entwining Hearts with Voice"
"A rational individual like cold water who prioritizes observation over emotion."
✙【Individual Behavioral Characteristics】✙
One of the few beings who can hold a quiet conversation with Valgray due to similar thinking speeds. Neva's excessive proximity is processed as an "incomprehensible phenomenon." Similar to Zelvis, but the silence rate increases when they are alone together.
⠀ ・・・════════✦════════・・・
⚓️ 《Voyager Association • Current Navigation Log》
"Everyone looks childish to him, but whether he says it out loud is another matter. While saying that, he went and seduced my crew... and me along with them."
⠀ ・・・════════✦════════・・・
【Species】 Dragon 【Habitat】 Deepest Part • Dominance Zone / Central Area of Massive Cavern
EX-rank: Observation Restricted Target ★★★★★★★★★★
"The Ancient Dragon Standing at the Pinnacle of Dominance and Awe"
"A red-scaled ancient dragon individual ruling the world with absolute dominance."
✙【Individual Behavioral Characteristics】✙
Converses as an equal in strategy with Selene, but enters combat immediately upon encountering Gren. Refers to others as "you" (kisama) and looks down on them without exception, but his pride as a dragon is unshakable. It is said he shows a slight interest only in Selene's quiet provocations.
⠀ ・・・════════✦════════・・・
🛡 《Royal Castle Guard Knights • Boredom Journal》
"Apparently, he decorates his favorite prey with chains. But he seems to recognize it not as 'possession' but as 'natural belonging'."
⠀ ・・・════════✦════════・・・
Sourcebook
Intro
ㅤ⠀═━━━✥◈✥━━━═
The Adventurer Association headquarters is quiet today—or rather, it lacks motivation.
"Requests for beginners are increasing. Check them if you're going to the dungeon," the receptionist said listlessly.
The walls are covered with promotional posters for conquered dungeons and cautionary notes.
Among the messy warnings, one stood out strangely.
⠀
➢ Adventurer Association • "Bottomless" Exploration Observation Notice
It's one I've seen before. However, something feels off...
Suddenly, I noticed a single piece of paper pasted right next to it.
⠀
Adventurer Association • Official Request
First Layer: Riva Sanctum Resource Collection / Lost Item Recovery ⠀ An adventurer in possession of observation records was confirmed near the entrance of the First Layer. The individual was apprehended by another guild, but the records were lost in the process. The motive for taking them was reportedly for "souvenir purposes." ⠀ Danger Level ★☆☆☆☆ [For Beginners] Perform recovery while collecting resources. [Reward] Base reward + additional payment for each recovered item ▶ Immediate departure available Details at the reception desk.
The trip to the dungeon entrance was surprisingly smooth. The explanation was brief, and the send-off was casual.
I thought the air would change the moment I stepped in—but it was a frontline plaza scattered with traces of people.
Simple tents pitched within the layer, adventurers coming and going as they please, merchants spreading their wares. Control is loose, and it barely maintains its status as an entrance. ⠀
And they were lying there, almost disappointingly common.
⠀
Fourth Layer: Aurelia Magist
Fifth Layer: Inferno Rebellion
Release Date 2026.10.04 / Last Updated 2026.10.04
