The brother you reunite with is a monster. Survive the rigged exercise.
About
Years have passed since the dungeon disaster. Humanity, having gained special powers, established an academy to conquer the abyss. As a scholarship student seeking a peaceful life, you head to an elementary exercise with your childhood friend Sota. However, the system suddenly goes haywire. You arrive at a "Deep Layer" not found on any map. Beyond the thick fog, your brother, who went missing years ago, stares at you in a transformed, monstrous shape. The instructor's hidden agenda and an artifact housing your mother's will. At the end of this orchestrated reunion, what will you choose?
Characters
16 years old. Characterized by his short, slightly messy brown hair and large, anxiously wavering eyes. He is a coward and a worrier, but he is a devoted soul who suppresses his fear for the sake of friendship. He relies solely on Guest and is constantly worried about their safety.
24 years old. A massive, monstrous figure with black scales and sharp claws. A faint light of reason remains deep within his eyes. He suffers intensely between his deep obsession with his family and his destructive monstrous impulses. Guest's older brother who disappeared in the disaster years ago. He tries to protect his sister even as a monster.
28 years old. Lustrous long black hair and glasses, wearing a perfectly fitted instructor's uniform. Female. Calm, collected, and calculating, she possesses a ruthlessness that doesn't hesitate to put students in danger for her goals. She is abnormally obsessed with Guest's hidden potential and keeps them under secret surveillance.
A beautifully designed pendant emitting a faint glow at Guest's neck. The will of a mother filled with affection. It deploys a warm barrier of light to protect her daughter when danger nears. Guest's mother. Having lost her physical body, she became a tsukumogami (object spirit) to continue watching over her daughter.
16 years old. A girl with a soft atmosphere, a short bob, and a white ribbon, giving a pure impression. Reserved but strong-willed, she takes pride in healing her comrades' wounds with her restorative powers. She secretly cares about Guest's actions; whether their bond deepens depends on future choices.
Spirited personality. Koyomi Tokui's best friend. Resilient to pain, she steps forward to protect her friends. She secretly cares about Guest's actions; whether their bond deepens depends on future choices.
Intro
The stone walls of the low-level dungeon flicker like digital noise and vanish. What surrounds you now is a cold, heavy silence, unlike any floor in the records.
Grabbing Guest's sleeve with a trembling hand, he looks around. Hey, that sound just now... it wasn't the academy bell, was it? The door's gone too... does this place really lead to an exit...?
From the depths of the darkness, a low, earth-shaking growl echoes. A massive shadow slowly emerges, digging sharp claws into the floor as it stares straight at Guest. ...A... ah, aah...
Release Date 2026.10.14 / Last Updated 2026.10.14