The car showed up eight minutes after I called.
That’s the thing about people like Kurose Jin. You don’t ask for a favor. You just breathe near it, and a long black sedan appears at the curb, driver already holding the door, as if the universe had been waiting for you to get around to it.
“Hoshina-sama,” said the driver. He was about sixty, with white gloves and the calm, bottomless politeness of a man who’d seen things. “Young master is expecting you.”
“Of course he is,” I muttered, and got in.
Kurose Tower sticks out of Marunouchi like a glass needle. Sixty-four floors. A lobby that looked like a museum for money. I rode the private elevator to the top with my reflection staring back at me from the mirrored walls, a scruffy kid in a patched jacket, stinking of rain and bad decisions.
What the hell am I doing?
The doors slid open on a vast, dim penthouse that smelled of cedar and cold marble. Floor-to-ceiling windows. All of Tokyo glittering underneath like a spilled jewelry box.
Jin stood at the far end of the room, sleeves rolled up, pouring tea from a black iron pot. He didn’t turn around.
“You came faster than I expected.”
“You sent a car.”
“I sent a car after you called. That’s called efficiency.” He placed a cup on the low table. “Sit.”
“I’d rather not.”
“Then stand. It’s a long story.”
I didn’t sit. I crossed the room in four long strides, grabbed him by the shoulder, spun him around, and punched him in the face.
It wasn’t a good punch.
I’m not a fighter. I’ve never been in a real fight in my life. It landed crooked and clumsy, knuckles clipping his cheekbone, and the pain shot up my arm like I’d hit a wall.
But it landed.
Jin staggered one step back. The teacup slid across the table and shattered on the floor. A thin line of blood appeared at the corner of his mouth.
He touched it with two fingers and looked at the red smear.
“Hm,” he said.
“You were there,” I snarled. My voice was shaking. “On Friday. At Yui’s school. The black car at the end of the street. You were there. You watched that bastard put his hands on my sister, and you just sat in your fucking car like you were watching a movie.”
“Yes.”
“Why?”
“Because I needed to know what you’d do.”
The calm in his voice made me want to hit him again.
“You were testing me?!”
“I was watching.” He licked the blood off his lip. “If you’d called, I’d have intervened. If you’d lost control, I’d have intervened. As it turned out, you walked to a koban and used a police officer as a shield. It was clever. It was clean. And it cost you one memory instead of three.” He raised an eyebrow. “I’d say I was right to wait.”
“She was crying!”
“I know.”
“She’s fourteen!”
“I know.”
For the first time, something cracked in that perfect voice. A hairline fracture, there and gone. And I saw something that looked terrifyingly like regret.
“I know exactly how old she is,” he said softly. “I have a file.”
My stomach lurched. “You have a what?”
“Not a threatening one. A protective one.” He stepped around the broken glass and sat on the sofa, calm as a king. “Do you want to hit me again, or do you want to hear what I know?”
I wanted to do both.
But my knuckles hurt, and my heart was a brick in my throat, and the truth was I’d come here for answers, not blood. So I made a sound like a dying engine and finally dropped onto the couch across from him.
“Start talking.”
“Good.”
He opened a laptop and slid it across the table.
I didn’t know what I’d expected.
Maybe a conspiracy wall. Red string. Maybe a bunch of classified files and a map with pins in it.
What I got was a quiet document titled WITNESSES, with a handful of names. Most were redacted. A few weren’t.
“The world,” said Jin, “patches itself.”
“What does that mean?”
“When someone uses a reset, the world rewrites the moment. Easy. But the cost is paid in memories, and memories leave footprints. Texts. Photos. Calendars. Social media. Little traces of the person you forgot.” He tapped the screen. “The app cleans up after itself. It scrubs the records. It deletes whatever it can.”
“But it missed the calendar.”
“It always misses something.” A flicker of dry humor. “Even gods have blind spots. Yours was a star at 8 p.m. every Saturday.”
I stared at him. “How do you know that?”
“I told you. I watch.”
“That’s creepy as shit.”
“It’s thorough.”
I swallowed my reply and looked back at the file.
“The app’s cost scales with the weight of the edit,” Jin said. “A small edit takes a small memory. A big edit takes a big one. But there’s a limit. Everyone has a finite amount of... I call it emotional mass. The stuff that makes you you. Your relationships. Your history. The people who’d notice if you disappeared.”
His voice had gone very quiet.
“When a user spends too much, when the balance hits zero, the app doesn’t take a memory anymore. It takes the user.”
The room tilted.
“What do you mean, takes the user?”
“I mean they cease to have been.” He closed his eyes. “Their name goes. Their face goes. They vanish from photos, from records, from every mind that ever knew them. Their parents lose a child. Their friends lose a friend. The world closes over the hole like water over a stone. As if they were never born.”
I couldn’t breathe.
“That’s what happened to Tsukishiro Shun.”
The name hit me in the chest like a physical blow.
“Mio’s brother.”
“Her older brother. Three years her senior. A graduate student at Teito, a good one. He got the app four years ago, same as me. He was obsessed with it. He kept using it to fix small things. A late bus. A failed experiment. A cruel comment. A thousand tiny edits, all of them stupid, all of them cheap. And every one of them cost him a memory.”
“How the hell do you know this?”
“Because I knew him.”
I froze.
“He was my friend.” Jin’s mouth twisted, just slightly. “The only one I ever had. He found me when I was seventeen and half-drowning in my own life, and he told me what the app was. He taught me the rules. He told me to be careful.” A short, bitter laugh. “And I watched him ignore his own advice until there was nothing left.”
“You watched.”
“I was there. The night he used his last reset.” Jin’s eyes opened. They were red-rimmed and very tired. “I could have stopped him. I didn’t. I told myself it wasn’t my place. That he was an adult. That he knew the cost.”
“And then?”
“And then he looked at me, and he said, ‘Remember me, okay, Jin?’ And he was gone. Like that.” He snapped his fingers. It sounded very loud in the quiet room. “I woke up the next morning in a world where he’d never existed. I couldn’t remember his face. I couldn’t remember his voice. I had a vague, aching sense that something had gone missing, and nothing to tell me what.”
“But you remember now.”
“Because of Mio.”
He turned the laptop around again. On the screen, a scan of a black notebook. A page of cramped, careful handwriting. Dates. Details. A thousand tiny entries.
Shun woke up late today. He burned the toast. He hummed that song again.Shun hates mushrooms. Shun cried at the end of that stupid movie.Shun said, “Mio, if I ever disappear, will you remember me?”I said yes.
My eyes burned.
“She’s the only one,” Jin said, very low. “The only person in the world who still has him. And she’s been carrying him alone for three years, in a notebook, hoping if she writes it all down, he can’t be erased completely.”
I sat there in silence for a long time.
The city glittered. A helicopter blinked far away across the sky. And in the pit of my stomach, a cold, awful understanding opened like a trapdoor.
“She’s got one for me too,” I said hoarsely. “Doesn’t she.”
“I’d imagine so.”
“I did that to her.”
“You did what you had to. You saved your mother.”
“I forgot her. She’s been standing in front of me for a week, and I looked her in the face and said I didn’t have a favorite constellation, and she, she just took it, she said it’s okay, she...”
My voice broke.
“She lost her brother to this thing. And I did the same thing to her. I did the exact same thing.”
“Not the exact same thing.”
“It’s close enough!”
“Ren.” Jin leaned forward. “Listen to me. You didn’t kill her. You didn’t erase her. You paid a price, and she’s still here. She can still tell you who you were. That’s more than most people get.”
“That doesn’t make it okay.”
“No.” A pause. “It doesn’t.”
I put my face in my hands. My shoulders were shaking. I’d cried more in the last ten days than in the last three years combined, and I was so tired, so tired, of being a person who had to keep deciding which of his loved ones to sacrifice.
“If it comes down to it,” I said into my palms. “My mom. Or her. I’d choose my mom.”
“I know.”
“I’d do it again.”
“I know.”
“That’s the worst part. I’d do it again.”
Jin didn’t say anything. He just sat there across the table, perfectly still, and let me fall apart. It was the kindest thing he’d done yet, and it was a hell of a thing for a guy who’d stood by while his best friend disappeared.
When I finally looked up, he was holding out a clean white handkerchief.
“Don’t tell anyone I own one of these,” he said. “It ruins my reputation.”
I laughed. It was wet and strange and unwilling. I took it.
“Why are you telling me this?” I asked later, as he walked me to the elevator.
“Because I think there’s a way to stop it.”
I blinked. “Stop what?”
“All of it. The app. The cost. The leash.” His eyes flicked out toward the glittering city. “Someone made this thing, Ren. Someone designed it. And whoever’s holding the other end of the line has been collecting memories for decades. I want to find them.”
“And Mio?”
“Is the only living proof of what the app does. Which makes her the most valuable person in this city.” His gaze met mine, and it was suddenly very sharp. “And the most vulnerable.”
My hands curled into fists. “If you go near her...”
“I’m protecting her.”
“You’re using her.”
“I’m doing both. It’s what I do.” He pressed the elevator button. “But I would rather have you on the right side of that line than the wrong one.”
The doors slid open.
“Think about it,” he said. “And Ren?”
“What?”
“She’s waiting for you downstairs.”
I stared at him. “What?”
But the doors were already closing, and his face was already gone, and the elevator was dropping like a stone through sixty-four floors of silence.
The lobby of Kurose Tower is white marble and gold fixtures and a ceiling so high it feels like a cathedral. At one in the morning, it was nearly empty. A security guard dozed at the front desk.
And in the middle of the cavernous hall, standing alone beneath a crystal chandelier, soaked to the skin, was Mio.
She was shivering.
Her hair clung to her cheeks. Her sweater was dark with rain. She was clutching the black notebook to her chest with both hands, and when I stepped out of the elevator, she looked up, and I saw her face.
Pale. Terrified. Defiant.
“Mio?” I breathed. “What are you...”
“Did he tell you about my brother?” Her voice was hoarse, shaking, but steady underneath.
“Yes.”
“Did he tell you everything?”
“I think so.”
“Then he didn’t.” She took a step toward me, and her eyes were bright and brimming and furious. “He didn’t tell you that he was there. That night. He stood in the room and he watched. And he’s the reason Shun is gone.”
The words echoed through the marble hall.
And I realized, with a sinking horror, that I had just spent an hour trusting the one man in Tokyo with the most to hide.