Abyss-chan Is a Social Menace: After Training Without Realizing It in the Super-High-Difficulty Dungeon ‘Abyss’, She Became the Most Fearsome Explorer Who Finds Humans Scarier Than Monsters

Narakino Rakuna is a shy, socially anxious sixteen-year-old girl from Hakone Town who has spent her entire life isolated due to her inability to interact with others. Her childhood attempts to make friends through eccentric behavior only deepened her loneliness. Discovering that dungeon explorers often stream their adventures, she resolves to become an explorer to gain popularity and friends. For five years, she trains in a cave she believes is a beginner dungeon, unaware that it is actually a connection to the special-grade dungeon known as Abyss. On her sixteenth birthday, she obtains her E-rank explorer license and embarks on her first expedition, carrying a massive backpack and wearing only casual clothes.

Rakuna enters a beginner dungeon and begins streaming, though she believes no one is watching. She encounters monsters such as Bugs and Uribons, defeating them effortlessly with bug spray and thrown stones, unaware of her own superhuman strength. Losing her sense of direction, she accidentally punches through a wall, creating an illegal connection to an adjacent advanced dungeon. When a tracking drone warns her of the danger, she mistakes it for a person and destroys it with a reflexive slap. Unaware of her mistake or the change in location, she continues deeper into the advanced dungeon, where her stream unexpectedly gains thousands of viewers who are fascinated by her bizarre behavior and inexplicable power.

Inside the advanced dungeon, Rakuna encounters a Wild Boar, a monster typically found in intermediate dungeons. Instead of fleeing, she prepares to cook it, treating the lethal encounter as a picnic opportunity. When the beast charges, she stops it with a single slap, embedding its head in the ground. She then proceeds to the boss room, where she faces the Infernal Flame Dragon, a rare dragon-type monster. Engulfed in fire, she blocks the breath attack by shoving her reinforced backpack into the dragon’s mouth, causing a blowback that incapacitates the beast. She finishes the dragon with a barrage of punches, solo-clearing the advanced dungeon in her first-ever expedition.

As Rakuna celebrates her victory, a rescue drone arrives to apprehend her for violating exploration regulations. In her panic, she attacks the drone again, only to realize too late that it was attempting to save her. The police, led by officers Himezawa and Kuchioka, arrest her and take her to the station. During interrogation, Rakuna remains catatonic until offered food, at which point she becomes emotionally overwhelmed. The police discover that her accidental connection helped stabilize the dangerous Abyss dungeon, leading authorities to drop all charges. Her stream goes viral, and she is promoted to D-rank, though she remains oblivious to her fame until she sees the viewer count during the interrogation.

Despite her promotion, Rakuna’s social anxiety persists. She attempts to stream again, this time aiming for C-rank by clearing a beginner dungeon. She develops a coping mechanism by referring to her viewers as “black eggs,” allowing her to communicate without fear. Her second stream attracts tens of thousands of viewers who speculate about her past, revealing rumors that she is a survivor of the Abyss Incident. Rakuna confirms she trained in the Abyss for five years under the guidance of an old man, though she remains unaware of the true nature of the dungeon or her own extraordinary abilities. The story follows her continued attempts to navigate the explorer world while managing her severe social phobia and growing online fame.