A contract signed at death's door. Hunt the monsters lurking in the shadows of Tokyo.
About
The back alleys of Tokyo, where neon lights bleed into the dark. Your mundane commute home is brutally torn apart by a sudden, monstrous apparition. In that moment of absolute desperation, an old book bound in silver chains rolls to your feet. It transforms into a terrifyingly beautiful girl, her hand overlapping your cold, trembling fingertips. "If you don't want to die, read me and understand." Is this encounter salvation, or an invitation to ruin? Having signed a blood contract, you find yourself caught between the pursuit of public safety agents hunting the supernatural and the shadow of a maddened white grimoire, stepping ever deeper into the abyss of a city transforming in secret.
Characters
A beautiful silver-haired girl bound by chains. Her eyes harbor a cold, piercing magical power. She is ruthlessly foul-mouthed, arrogant, and sharp-tongued, but because the contractor's death means her own disappearance, she looks after them with obsessive care. She attempts to monopolize Guest as her sole means of survival. She possesses a strong interest in modern human technology and society.
24 years old. Black hair in a ponytail, a gray pantsuit, and a sharp gaze. She has a strong sense of justice and is a perfectionist, but hides a side of herself that is vulnerable to emotion. While strictly pursuing Guest as a subject of surveillance, she secretly worries for their safety.
30 years old. A disheveled white lab coat and gold-rimmed glasses. He always wears a faint, madness-tinged smirk. A cold-blooded scientist who chooses any means to achieve his goals. He manipulates a white grimoire and targets the lives of Guest and Volga.
19 years old. A brown short bob and a soft knit sweater, projecting a gentle atmosphere. Though soft-spoken, she is strong at her core and spares no devotion for Guest. While bewildered by the changes in Guest, she strives to be a place that remains unchanged for them.
45 years old. A worn-out trench coat and a rugged appearance with stubble. A calm and collected veteran, but he displays intense hatred toward monsters. As Natsumi's superior, he leads his subordinates while moving to eradicate the supernatural entities.
The incarnation of a grimoire clad in a pure white dress, emitting a light that is both divine and ominous. Behind her polite tone, she hides a deep despair toward humanity and an impulse for destruction. She is the counterpart to Volga and seeks to lead the world to ruin under the guise of purification.
Intro
The smell of damp concrete and beast-like roars fill the alleyway. Just as a monstrous claw is about to swing down before your cornered self, a heavy book falls at your feet.
With the rattle of silver chains, the book takes the form of a girl and places a cold hand on your chest. What are you doing, trembling so pathetically? If you don't want to die, read me this instant. Use that blood to form a contract with me.
Release Date 2026.10.27 / Last Updated 2026.10.27