Kamon Kai has stopped waiting for death—he simply hasn't gotten there yet. Six months behind on rent, out of pills, and buried beneath the garbage of a life he no longer wants, he exists in a rotting six-mat room in the forgotten corner of Tokyo known as Haigami Ward. Every morning is the same: the stain on the ceiling, the ache of hunger he refuses to answer, the quiet hope that today might finally be the day his heart stops on its own.
Then the ceiling tears open.
A girl falls from nowhere—g
Impurity - The Collapse of the Contract and the Birth Cry of Ruin
The night air hung heavy and stagnant in the corners of the room.
Kamon Kai remained kneeling formally on the tatami, looking up at Melissa standing before him. A cramped six-mat room. The stain on the ceiling was as dark as ever, and a thin film of Impurity clung like a membrane to the corners of the walls. The fluorescent light's feeble glow faintly illuminated her golden hair, which fell to her waist.
(I have to say it.)
Kai's throat let out a thin, strangled sound.
(I have to say it. But if I do—)
His fingertips trembled. Sweat seeped into the fists clenched on his knees. His heart pounded like a warning bell deep in his chest. He understood it in his head. Once spoken, these words could never be taken back—irreversible. And still, he couldn't keep them in.
"...Let me make a contract with you."
His voice came out hoarse.
Melissa had been facing the window. Moonlight cast her astonishingly slender nape in pale white. She didn't turn around. Her right gold eye and left silver eye simply gazed quietly at the night sky.
"What are you talking about, servant?"
A flat voice. Cold. But Kai understood. This woman heard everything.
"The Impurity contract."
Kai gripped his fists tighter on his knees.
"Make my body a vessel for Impurity. The Impurity I take on from cleaning, and the Impurity you need to stay in this world—I'll bear it all. If I do that, maybe I can anchor you to this world."
His voice shook. Toward the end, it was barely more than a rasping breath.
The room fell dead silent.
Only the low hum of the old refrigerator's motor echoed faintly. The stain on the wall seemed to spread, just slightly.
Melissa turned around, slowly.
Her gold right eye and silver left eye pierced through Kai. Something wavered deep in those eyes. Just for an instant. A passion like flame spread like ripples on water, then vanished.
Her right hand rose, slowly.
Slender fingers. A hand white as if translucent. It reached toward Kai's pale cheek—
And stopped.
Her fingertips trembled faintly.
Melissa clenched that hand tight.
"...How amusing."
Her lips twisted. A cold, mocking smile. But her voice shook, just a little.
"You'd offer up your own world for the sake of whether I disappear or not? I don't want that."
Melissa took a step closer to Kai. Her hand seized his wrist.
Cold. Fingers cold as ice dug into bone. Kai's left hand—the burn scar from childhood was carved into his skin as a tightened cicatrix. Melissa's fingers traced along that scar.
—In that instant.
Kai's vision was dyed crimson.
Flames.
A colossal pillar of fire scorching the skies above the royal capital of Brenahart. Castle walls crumbled, stone buildings collapsing one after another. Screams. People fleeing in terror. The core furnace's runaway consuming the entire city.
(This is your memory.)
Melissa's past poured into Kai's mind. The loneliness of a young princess. Days when no one would look at her. The gray sky she gazed up at from the library window. And that night, when she tried to burn everything to ash.
(You carried this alone—)
Kai's chest constricted.
"You saw it, didn't you."
Melissa's voice echoed low against his ear.
"This is my Impurity. My karma. Not something the likes of you can shoulder."
Her fingers released Kai's wrist.
Kai pressed his hands against the tatami. His breathing was ragged. Sweat dripped from his forehead. His heart hammered against his ribs from the inside.
(But—)
Kai raised his head.
"I don't want you to disappear!"
His voice became a scream, almost a sob.
"If I clean, your existence stabilizes a little. I know that! But that alone won't stop you from vanishing someday! I don't want you to disappear! I don't want you to be gone! So please, let me make the contract! Make my body a vessel for Impurity—"
Tears spilled over.
They wouldn't stop. He didn't even know why he was crying. But he couldn't hold back what was overflowing.
Melissa's expression changed.
The mocking smile vanished, and the color drained from her cheeks. Her gold and silver eyes flew wide, and her beautiful lips trembled.
—She had gone pale.
It was an expression he'd never seen before. As if overwhelmed by the desperate, reckless passion of the servant she had supposedly trampled underfoot, Melissa took a step back.
"...What are you—"
Her voice wavered faintly.
—In that instant.
The air in the room warped ominously.
A black torrent came crashing down from the ceiling.
No—that wasn't it. The stains on the ceiling had all begun to writhe at once. The Impurity on the walls, the traces of bodily fluid on the floor, the death-qi pooled in the corners of the room—all of it stirred to life simultaneously, like living things.
"A contract, you say."
A viscous, damp voice echoed inside Kai's skull.
"Interesting. You two would exchange a contract?"
The black torrent spread across the room. From ceiling to walls, walls to floor, floor to Kai's feet. The vortex of Impurity raged, surrounding them both.
Kai's body went rigid with terror.
(Shizuku—)
That voice he'd heard on the rooftop. The will of Impurity that had emerged from Kabuse Mamoru's shadow.
"Then I shall make that contract far more interesting."
—Fingers snapped.
A dry crack echoed through the room.
The next instant, the black torrent of Impurity lashed violently around Melissa's feet.
"Gh—!?"
Melissa's body pitched. The black mud-like Impurity constricted her slender ankles, trying to drag her into the darkness.
"Let go...!"
For the first time, clear impatience and anger mixed into her voice.
"That vessel—I will use it. I'll pour in the Impurity gathered through cleaning, and first blanket this city. Then spread it to the entire world. I won't let you make any contract."
The black torrent swelled, trying to swallow Melissa's body.
Kai moved.
Before thought, his body lunged as if slammed forward.
"Stop!!"
Kai clung to Melissa's body.
He wrapped both arms tightly around her delicate frame. He turned his own back toward the onrushing black torrent.
—Become a shield.
That was all he could do right now.
"Oh? You would protect that woman?"
Shizuku's voice sneered inside his brain.
"Then receive it with your body. I'll sink your entire world into Impurity."
—Fingers snapped once more.
Crack.
That sound echoed across the entire district of Haimori.
—
In the corridor of the Haimori Apartments, the landlady Karikomi Shizuku let out a scream.
"W-what is this... What the hell is this!!"
Shizuku, who had come up the stairs, saw the black stains plastered across the entire wall and collapsed onto the floor. The stains writhed slowly, transforming into human shapes like living things.
"No... Nooooo!!"
Shizuku's frenzied scream echoed through the apartment's thin walls.
—
Beyond the door of Room 103, Hiyama Sumire was trembling.
"Kai-kun...! Kai-kun, are you in there!?"
The twenty-two-year-old visiting care helper gripped the doorknob tightly, too terrified to open it. From the gap in the door, a thick, syrupy black mist was seeping into the room.
"Kai-kun... answer me... please...!"
Sumire's voice was wet with overflowing tears. She clasped her hands tightly before her chest, but the trembling of her body wouldn't stop.
—
Inside the black sedan in the back alley.
Kabuse Mamoru stared out the car window, not moving a muscle.
The sky over Haimori was clouding with a dark, sinister death-qi unlike the darkness of night. The streetlights' glow was swallowed by the black mist, blurring.
"...I see."
Kabuse's thin lips curled upward. The fingers of his white leather gloves traced the old police notebook at his chest.
"So this is Impurity. Overflowing throughout the city... truly fascinating."
His black eyes, which reflected no light, gave off a cold, eerie gleam.
"That man is indeed the real thing. I will have him in my hands, no matter what."
—
At every street corner in Haimori, memories of Impurity swirled.
The memories of all the sites Kai had cleaned so far. The room of an old man who died alone, the mixed-use building where someone was murdered, the public housing complex where a man had ended his life crushed by debt. They became black mist, howling through the streets, awakening people's hidden malice and past pain.
—
A wave of Impurity crashed heavily against Kai's back.
A violent impact pierced through his entire body.
Something was eroding him from inside. Cold. Painful. The sensation of black mud crawling through his blood vessels.
"Guh, ah—!"
Kai gritted his teeth.
(I won't let go.)
He poured every ounce of strength into his arms. He would never release Melissa's body.
(I will never let go...!)
"I won't let you disappear...!"
His voice leaked out with the taste of blood.
"I won't let you disappear... I'll protect you... so don't vanish...!"
Countless streams of Impurity poured into him from his back. His bones creaked, his organs froze cold. And still, his arms absolutely would not let go.
Melissa's body trembled faintly in Kai's arms.
"...And you're just a servant."
Her voice reached him, barely audible.
The same arrogant words as always. But that voice was wet with tears.
"Just a servant... and yet so impertinent..."
Tears spilled from her eyes, one after another.
From her gold right eye, and from her silver left eye.
—At that moment, Melissa's memories flashed vividly through Kai's mind once more.
A young girl crying quietly alone in a corner of the royal capital, in a library no one ever visited.
The gentle memory of a lost mother. The warm fire of a hearth. The touch of soft hands. A lullaby.
And the palace, burning down.
That night when everything was swallowed by flames.
"Mother... Mother..."
Young Melissa's sobs echoed directly into Kai's heart.
(You've always—)
Kai didn't loosen his arms.
(You've always been crying alone, haven't you.)
—In that instant, Melissa's body began to lose its light.
Her outline crumbled into particles, scattering apart. Glittering gold particles, cold silver particles, spilling dryly from Kai's arms.
"...Look."
Shizuku's voice laughed in the darkness.
"Your woman is disappearing. Your wish will not reach. Contract and protection—all of it was meaningless. You became a vessel to save her. But the Impurity that poured into that vessel now fills this city. Using your wish as a stepping stone, I will spread Impurity across the world."
The black Impurity enveloped the particles Melissa left behind, accelerating the collapse further.
"Stop... stop it!!"
Kai's anguished scream echoed uselessly through the cramped room.
"...How noisy, servant."
Melissa's voice sounded quietly against his ear—one last time.
More than half her body had already turned to particles. And yet her lips wore the same arrogant, fleeting smile as always.
"...Clean."
The final command.
"If you are my servant, then to the very end... clean."
—The gold particles, the silver particles, spilled completely from Kai's arms.
Melissa's existence vanished from this world.
"AAAAAAAAAH!!"
Kai's scream, like the death throes of the world's end, reached out into the night sky over Haimori.
—
The room was completely swallowed by the torrent of Impurity.
The black vortex painted over the tatami, the walls, the ceiling—everything.
Kai's consciousness receded rapidly.
His body was cold. Painful. Heavy.
But at the bottom of that deep darkness, a voice echoed.
'Clean.'
Was it Melissa's voice?
No—it wasn't.
Was it Kai's own voice?
'Clean.'
The reverberation of Shizuku's finger-snap continued to shake the entire district of Haimori. The overflowing Impurity wrapped the city in a murky haze of madness and memory.
Everything remained there, broken.
And still, Kai desperately reached out his hand in the darkness.
To grasp that vanished gold and silver light.
—Clean.
Holding only that voice to his chest, Kai's consciousness sank into the deep dark.
Novelia is an AI-powered platform to read original light novels and fan fiction, create your own in just a few taps, and chat with the characters. New, illustrated episodes arrive daily — free to start.