The last train never truly ends—not for Tono Akane, anyway. Trapped in a dead-end job that's slowly hollowing her out, she boards the familiar late-night train home, numb to everything but the rhythmic sway of the carriage. But tonight, the train doesn't stop. The passengers don't move. Her phone shows no signal, frozen at a time that never changes. And on the route map above her, glowing faintly in a script no train line should display, is the name of a station that was erased from existence ye
Route Map Without a Terminal - The Price of Formlessness
The door to the conductor's cabin had opened without a sound.
Akane stepped into the dim box, still gripping the cold metal handle. The fluorescent light flickered pale blue over the instrument panel. The air was cold, and the smell of mold and iron stung her nose.
(Until just a moment ago, Yagami-san was here.)
Akane glanced at the folding chair against the wall. A faint afterimage of warmth, as if someone had been sitting there until seconds ago. But no one was there now. The conductor had been left behind on that platform.
In Akane's hand was a single sheet of paper.
A yellowed operation log, its edges torn and fraying. On it, words scrawled in blue ink. The continuation of the record Yagami had handed her. The Formless Record she'd received along with the conductor's cabin key at Kunugidai Station.
"Subject: Mio"
"Target: Tono Akane"
"Act: Formless"
"Cost: Complete erasure from the target's memory"
Akane's eyes traced the words again and again.
Complete erasure.
(Mio vanished from my memory.)
A tingling numbness spread through the core of her head. Her fingertips were cold. The hand holding the paper trembled slightly.
"Reason: To protect the target from the Devourer"
The Devourer.
The moment she saw those words, Akane's vision lurched.
Behind her eyelids, black mist spread.
No—not mist. Something far more loathsome. Mouths. Countless mouths. From within the black haze, tooth-lined fissures opened one after another, lunging to bite at her small arms, her legs, her hair.
(That was—)
Akane squeezed her eyes shut without thinking.
The image didn't vanish. If anything, it blazed brighter behind her closed lids.
Small hands. Her own hands. Running down a gravel path. Out of breath. Crying. Screaming for help. But no sound came. Her throat seized, and only a thin, whistling wheeze escaped.
And then, another hand, gripping hers back.
White, small, but strong.
That hand pulled her. Run, it said. This way. Weaving through the shadows of the dark town without a moment's hesitation. The black haze chased from behind. The bared teeth of those mouths closed in on their feet.
But that hand never let go.
Never, ever let go.
"—"
Akane collapsed to her knees.
She caught herself on the cold floor of the conductor's cabin with both hands. The operation log fluttered to the ground.
(That hand was)
(That child was)
Akane's vision blurred with tears. Her throat burned. She couldn't breathe properly. A dull pain tore through the center of her chest.
(That child saved me.)
Akane covered her face with trembling fingers.
Tears spilled through the gaps.
She had forgotten.
That child. That night. Being chased by the black haze, running for her life. All of it. All of it.
(I forgot.)
Akane wept in silence.
The fluorescent light in the conductor's cabin flickered blue again.
That was when it happened.
"Akane."
A hoarse voice reached her.
Akane lifted her head.
A shadow stood in the doorway of the conductor's cabin.
Mio.
The silhouette of a small girl, wavering in black. Long hair hid one eye, and behind it a gray pupil glimmered faintly. But her outline was unstable as smoke, ready at any moment to dissolve into the air.
"...Mio."
Akane called the name in a cracked voice.
Mio said nothing. She only stared at Akane.
That gaze hurt.
(Because I forgot this child—)
Akane looked again at the operation log on the floor.
"Cost: Complete erasure from the target's memory"
Images flooded into Akane's mind once more.
This time, the continuation of that night.
Slipping past the shadows of the housing complex, the two of them hid behind a small shrine. The black haze still howled in the distance. Young Akane was sobbing. I'm scared, I'm scared, I don't want this anymore.
But Mio was smiling.
"It's okay."
She said it and stroked Akane's head.
"Because I'll protect you, Akane."
Mio's hand took Akane's.
"But for that to work, Akane, you have to forget about me."
Young Akane shook her head, crying.
No, she said. I don't want to forget.
Mio smiled sadly.
"It's okay. I won't disappear."
Mio's fingers intertwined with Akane's.
"Let's pinky-swear."
Young Akane, face a mess of tears, laced her finger with Mio's.
"Pinky swear, cross my heart."
Their voices overlapped.
"Break it and I'll make you swallow a thousand needles."
In that instant, Mio's outline began to glow from within.
"Akane, you must never forget."
Mio's body turned to motes of light and was drawn into Akane.
"You must remember my name, no matter what."
Mio's finger slipped free of Akane's.
"Because it's a promise."
Mio smiled brightly one last time.
And then she vanished.
—It was the moment the existence called Mio was completely erased from Akane's memory.
Akane sat on the floor of the conductor's cabin, sobbing without sound.
"...I'm sorry."
Akane murmured in a trembling voice.
"I'm sorry, Mio... I forgot... that promise, that night, all of it..."
Akane lifted her tear-soaked face and looked at the shadow in the doorway.
Mio was still there.
Black mist rose from Mio's body. Her outline was fainter than before.
"Akane."
Mio's voice was so small it might have been swallowed by the wind.
"Akane, you're crying."
Mio slowly approached Akane.
There were no footsteps.
"Akane, don't cry."
Mio crouched before Akane.
Beyond the black mist, her gray eyes wavered with sorrow.
"When you're sad, Akane, I'm sad too."
Akane reached out toward Mio.
She wanted to touch her.
This child who had vanished to protect her that night.
But the instant Akane's fingers touched Mio's outline—
Mio's body scattered into mist.
"—!"
Akane gasped.
The place where Mio's shoulder had been turned to black haze and dissolved into the air.
"Akane, no."
Mio shrank back.
"Akane, you mustn't touch me."
Mio's voice was shaking.
"If you touch me, Akane, I'll break."
Akane's heart froze.
(Touch her, and she breaks.)
Akane slowly withdrew her outstretched hand.
Her fingertips were faintly stained with black haze.
(I'm breaking Mio.)
The pit of Akane's stomach went cold.
"...I'm sorry."
Akane apologized in a trembling voice.
"I'm sorry, Mio... I want to save you, but... I can't even touch you..."
Akane's tears fell to the floor of the conductor's cabin.
Mio, keeping her distance, shook her head.
"That's wrong."
Mio's voice was hoarse.
"Akane, it's not your fault."
Mio stared at Akane through the black mist.
"I decided."
Mio's outline wavered again.
"I decided to protect you, Akane."
Listening to Mio's words, Akane felt her chest would burst.
(This child knew she would disappear.)
(And still, she protected me.)
Akane clutched the operation log from the floor.
The paper crinkled.
"Mio, I can't remember your real name."
Akane said it through her tears.
"I didn't even know the name Mio until Yagami-san told me. So how could I know your real name..."
Akane's voice broke in her throat.
Mio watched her quietly.
"Akane."
Mio spoke haltingly.
"Akane, you can remember."
Akane raised her head.
Mio's gray eyes looked straight at her.
"I believe in you."
Those words pierced Akane's chest.
Believe.
In someone who had forgotten her.
In someone who had broken her.
And still, this child believed.
Akane bit her lip.
"...Mio."
Akane stood.
"I will remember. No matter what."
Akane's voice was still trembling. But beneath it was unmistakable resolve.
"Your real name, our promise, all of it. So—"
Akane nearly reached for Mio, then stopped herself.
She couldn't touch her.
If she touched her, she would break her.
Akane clenched her half-extended hand into a fist.
"So don't disappear."
Akane's voice shook.
"Don't disappear, Mio... please..."
Hearing Akane's words, Mio smiled sadly.
"...It's too late."
Mio's voice was faint, as if dissolving into the wind.
"I can't hold on anymore."
Akane's heart leaped.
"What are you saying?"
Akane's voice rose.
"Don't say that. I will—I will definitely—"
That was when it happened.
The train car lurched violently.
With a heavy jolt, Akane's body slammed against the wall.
"—!"
Akane braced herself against the wall of the conductor's cabin.
(What's happening?)
The car was accelerating.
Outside the window, black darkness streamed past.
No—it was the car that was moving.
"Mio!?"
Akane looked at Mio.
Mio's outline was wavering violently.
Black mist poured from Mio's body, spreading through the entire conductor's cabin.
"Akane, I'm sorry."
Mio's voice echoed through the car.
"I have to send you back, Akane."
Mio's body crumbled further.
The tips of her fingers vanished like ash.
Her arms, her shoulders dissolved into black haze.
"Mio! Stop!"
Akane screamed.
"Mio! Please! Stop! Don't send me back!"
Akane tried to cling to Mio.
But she couldn't touch her.
If she touched her, Mio would break.
Akane could do nothing but scream in front of Mio.
"Mio! I haven't remembered anything yet! Not your name, not our promise! So—"
Akane's voice broke with tears.
"So wait... please..."
Mio gazed at Akane with her crumbling body.
"Akane."
Mio's voice was barely audible now.
"I can't tell you not to forget."
Akane's chest ached as if pierced by a cold blade.
(I can't tell you not to forget.)
(Because I forgot Mio.)
(Because I made Mio like this.)
Akane crumpled to the floor.
The car accelerated further.
Outside the window was already pitch black.
Darkness without end.
This train was running toward a place it could never reach.
"Mio... Mio..."
Akane kept calling Mio's name.
But Mio's form had almost entirely dissolved into black haze.
"Akane."
Mio's voice came one last time.
"Aoi... ga... oka..."
In that instant, the car door slid open with a sound.
Akane raised her head.
Beyond the door, a sunset spread wide.
A red sunset, forever caught in the act of sinking.
A rusted swing set swayed though there was no wind.
Aoi-ga-Oka.
The place where Akane and Mio had made their pinky promise.
"Mio, wait! I'm not getting off!"
Akane clung to the open door.
"I'm staying with you! I won't get off, ever!"
Akane's fingers gripped the edge of the door.
But the car's acceleration pushed her body outward.
"Mio! Mio!"
Akane turned and looked at Mio.
Mio didn't even leave a shadow behind.
Only black haze, slowly fading in the depths of the conductor's cabin.
"Mio—!"
Akane's scream was drowned out by the roar of the runaway car.
Akane's body was flung from the door.
Her vision stained red with the sunset.
Akane slammed onto the platform.
Pain.
But more than that.
(Mio is disappearing.)
Akane tried to get up.
But her body wouldn't move.
She couldn't see through her tears.
"Mio... Mio..."
Akane collapsed on the platform, crying aloud.
Without remembering Mio's real name.
Without remembering what the promise was.
Akane was crushed by the fact that she had killed Mio.
The sunset illuminated Akane's tears.
The swing creaked, creaked as it swayed.
Listening to that sound, Akane just kept crying.
(Mio.)
(I still can't call your name.)
Akane's right hand unconsciously formed the shape of a pinky promise.
But there was no longer a small finger anywhere to intertwine with hers.
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