The glass bridge ran from the east wing of Building C to the building behind it — a covered walkway added sometime in the seventies, Rina guessed, when the school had expanded and needed a connection between structures. It was not a particularly remarkable piece of architecture. It was glass on three sides, with a metal frame that had been repainted several times over its life, each repainting slightly different from the last, so that the layers were visible at the edges like geological strata.

From the bridge, if you stood on the right side and looked at the right angle, you could see the city to the south and west — the elevated train line, the cluster of newer buildings near the central station, and beyond them, on a clear day, the suggestion of the harbor.

On a clear day, if you knew what you were looking for, you could also see the place where the elevated line bent and the track diverged, for approximately forty meters, into a spur that had once led somewhere.

Old Seika Station's ghost. The remnant of the line they had visited on their first Saturday.

Toma had told her about this view at some point in the autumn — she didn't remember when exactly, or whether he had said it directly or she had understood it from something else he said. But she had been coming to the bridge on Friday afternoons for the past two months, when the school was emptying out and the bridge was quiet, and she had been looking at that ghost track and thinking.

Today he was already there when she arrived.

This happened occasionally now — the arrivals aligning, the bridge functioning as a meeting place they had never formally designated. She had stopped being surprised by it.

She went to stand beside him at the railing. Below, the school grounds were emptying in the usual Friday-afternoon way. Above, the sky had gone the color that autumn skies went in the late afternoon: deep blue at the top, something warmer at the horizon.

"Next week is the sixth stop," she said.

"Yes." He was looking at the track divergence. She looked at it too. "Harbor Drain Six. The documents said it was a functional drain — still operational, part of the current infrastructure. Not abandoned the way the station was."

"Which means we can't just walk in."

"Which means we need to find a legitimate access point. Or a less legitimate one that doesn't require explaining ourselves to anyone."

She had been thinking about this. "There's a maintenance access record in the city's infrastructure database — public, searchable. I found it last week. The drain connects to a maintenance shaft network. The entry points are labeled."

"You searched the city's infrastructure database."

"For this, yes."

He looked at her with the expression that she had come to understand meant he was recalibrating upward — the slight adjustment that happened when she did something he had not anticipated.

"I'll look at the same database tonight," he said. "Cross-reference the notation."

"I already sent you the access point coordinates."

A pause. "When?"

"This morning. Before school."

He took out his phone. Looked at it. She watched him find the message — she had sent it at seven-fifteen, before the school day, before their paths would cross — and process the information it contained.

"This is the entry point northwest of the main harbor pier," he said.

"Yes. Accessible from a public walkway. We'd need to wait for a maintenance window — they're on a schedule. There's one next Saturday, seven to nine a.m."

"You've been planning this for a week."

"I've been thinking about it for longer." She looked at the ghost track. "The sixth stop is the important one. The archive documents kept coming back to it. Whatever your father built toward — I think it's connected to what's at the sixth stop."

He was quiet.

She looked at him. He was looking at the track divergence, but she had the sense he was not really seeing it — was instead looking at something further, the shape of the thing they were approaching.

"He was there," she said. "Your father. At Harbor Drain Six. Something happened there that changed what he was doing."

"Yes."

"Do you want to know what it was?"

He was quiet for a long time. The school emptied below them. The sky deepened.

"Yes," he said. "And no. Both."

She understood this. She had felt the same thing at the archive, when the pattern had become clear enough to see — the wanting to know combined with the awareness that knowing would change things, that some information could not be taken back or put away.

"I want to know," he said, "because not knowing is — worse. Not knowing means the story is unfinished. It means I'm moving through a city that has done something I can only see the edges of." He paused. "And I want to know because it's his story. It's mine too, in a way. I should know my own story."

"Yes," she said. "You should."

"And no," he continued, "because what I'm afraid of — not of the evidence, not of what Mirai Axis has done — is that what I find at the sixth stop will tell me something about my father that changes how I've understood him. That makes everything more complicated."

"It might do that."

"Yes." A pause. "But you're going to come with me anyway."

"Yes."

He turned to look at her then. She met his gaze — the direct version, the one he used rarely, which she had learned meant that whatever was being communicated was beyond the register of the managed, neutral version.

"I want to find the seventh stop," he said. "Whatever happens at the sixth."

She heard in this what he meant, which was more than the map.

"Me too," she said.

The bridge was quiet. Below, the last students were leaving through the main gate. The sky had gone further toward evening. The ghost track was still visible, the forty meters of spur that remained where a line had once been, that someone had decided was not worth removing.

"When we find the seventh stop," he said, "and we understand everything — what do you want to do?"

She thought about this. She had been thinking about it since Rain Archive — since the moment she had understood that the map was not just preservation but testimony, not just documentation but a case. A request made to whoever followed it, to take what was here and do something with the having-of-it.

"I want to make sure it counts," she said. "I want the testimony to reach someone who can act on it. Not just us. Someone who can put it where it can't be ignored."

"A journalist," he said.

"Or a public official. Or both. Or — I don't know yet. But someone who can carry it further than the two of us can."

He nodded slowly.

"After the seventh stop," he said.

"After the seventh stop."

The promise settled between them, added to the others that had accumulated over the autumn — the original pact in the park, the agreement on Tidewalk, the unspoken ones made in the space between action and non-action on trains and platforms.

She looked at the ghost track in the evening light.

"One more week," she said.

"One more week," he said.

She thought about everything that was contained in that week. The sixth stop — the difficult one, the one the documents kept returning to. Whatever was at Harbor Drain Six that had been important enough for Akio Kanzaki to incorporate into the infrastructure of his argument.

And then, after that, one more Saturday. The seventh stop.

She thought about what came after seventh stops.

She looked at him — at the particular version of him that existed in the early evening on a glass bridge at the end of a school week, when there was nothing required of him and he was simply himself. She had collected many versions of him this autumn: the one in the mechanical workshop, the one at the stone table, the one on trains, the one in archives. The one who held transit cards carefully and moved to be in position when the terrain was uncertain.

This version was one of her favorites.

She thought: I should tell him something.

She thought: not yet. Not here. After.

After the seventh stop, when everything was complete, when the testimony was ready to be carried, when the map had been followed all the way to its end — then she would have something to say that wasn't tangled up in all the things they were still working toward.

Then she would say it clearly.

"Go home," she said. "Prepare for Saturday."

He almost smiled. She could see it at the edge of his expression — not the managed neutral but the thing underneath it, which was not unsmiling at all.

"You're telling me to prepare," he said.

"You always prepare. I'm acknowledging it."

"Yes," he said. "I'll prepare."

They left the bridge together and went through the school in the settling dusk, out through the rear gate, and separated at the junction as they always did.

She walked home with the autumn evening around her and the map in her bag and one week between now and the sixth stop, and after that one more week, and after that the thing she had been moving toward since a Thursday in September when she had picked a lock and found something that had been waiting.

One more week.

She could do anything for one more week.

She walked home faster than usual. Not toward anything in particular. Just because the city was there, and she was in it, and she was almost at the end of a map that she had carried all autumn — and something at the end of it, something she had not accounted for when she had tucked it into her bag and closed the door of a dusty room behind her, was waiting.

Something that was, she thought, going to be worth the walking.

She walked home.

She was ready for Saturday.

The week passed the way weeks passed when they contained something she was moving toward — not slowly, not agonizingly, but with a quality of presence she had not often experienced before this autumn. She was in each day rather than passing through it toward the next obligation. She noticed things: the particular quality of the light at different hours, the way the school sounded different on different days, the specific temperature of each morning.

She was, she realized, paying attention to her life.

This was new. She had spent three years at Seika managing her life — calibrating, optimizing, meeting requirements. Paying attention was different. Paying attention meant things could surprise you. It meant you could be moved by something you hadn't anticipated. It meant the texture of a week could matter, not just its results.

She was grateful for that. She was grateful in the particular way you are grateful for things that change the quality of your life so completely that you can only look back and wonder how it was different before.

On Wednesday she solved the question of the woman in the photograph.

She had been running quiet searches in the background — the way she ran everything in the background when it mattered, methodically and without rush. She had the photograph on her phone; she had the date; she had the context of the development projects. She was looking for someone who had been in the municipal development office seventeen years ago, who had connections to the early Mirai Axis, and who had subsequently become someone she would recognize.

She found it in an archived article about a Mirai Axis executive appointment, three years old.

The woman in the photograph was Naomi Kisaragi. Currently Creative Strategy Director at Mirai Axis. Akio Kanzaki's former colleague.

She looked at the article for a long time.

She thought: this is one of those pieces of information that reorganizes other information.

She thought: Naomi Kisaragi worked with Akio Kanzaki before she worked for the company that destroyed what he was trying to preserve.

She thought: that is either a coincidence or it is not, and the pattern we have been following does not contain many coincidences.

She did not message Toma immediately. She held the information through Wednesday evening, through Thursday, considering the shape of it. She wanted to understand what she was looking at before she handed it to him — because it was about his father, and handing it to him wrong would matter.

On Friday she met him on the glass bridge.

He was there before her, as she had expected. She stood beside him at the railing and looked at the ghost track and said: "I know who the woman in the photograph is."

He turned.

"Naomi Kisaragi," she said. "She was your father's colleague at the development office. She's now a director at Mirai Axis."

He was quiet for a long moment. She watched him process this — the particular quality of his thinking when the information was significant, the slight adjustment of his posture that meant he was recalibrating.

"She knew him," he said. "Before."

"Yes. She was there — in the photograph, which means she was there in the beginning. When he was still the person who smiled without calculating it."

"And then she went to work for the company."

"That's what the record shows."

He looked at the ghost track. "That's not a small thing. To know someone when they're fighting for something, and then become part of what they're fighting against."

"No," she said. "It's not a small thing."

She let the silence hold for a moment. Then: "She might know things. About the sixth stop. About what happened."

"She might."

"Or she might be someone we need to be careful about. Someone who knows we're following the map before we want that known."

"Yes." He was quiet. "I need to think about this."

"Yes."

They stood on the glass bridge in the early evening light, with all of this between them, and she thought: we are getting close. We are getting close to the thing the map has been leading to. And the closer we get, the more it matters — not just the evidence, not just the case, but the human parts of it. His father. This woman who had been in the photograph. Whatever had happened at Harbor Drain Six.

She thought: I am going to be here for all of it.

Whatever it is.

"Saturday," she said.

"Saturday," he said.

One more week. Then the sixth stop.

Then the seventh.

Then everything after.

That evening, at home, she spread the map on her desk for the first time in weeks — the full map, unrolled, all seven symbols visible. She looked at it in the lamplight the way she had looked at it on the first night: as something that was asking a question.

She had been so focused on each stop, each week, each piece of evidence that she had not looked at the whole in a long time. Now she looked.

Seven circles. Seven symbols. Seven places in a city that had been trying to forget them.

And at the top: If the city forgets the way home, start from the first stop.

She had started at the first stop.

She had found all the stops after it.

One more Saturday for the sixth. One more Saturday for the seventh.

And then she would know what it meant to find the way home. Whether that meant the city's home — the truth of it, the version that couldn't be managed and optimized and replaced with something more profitable. Or some other kind of home.

Or both.

She rolled the map up carefully. She wrapped it in its canvas. She held it for a moment before putting it in her bag.

She thought about a Thursday in September. A locked door. A canal of pale gold light. Something that had been placed carefully and had been waiting.

She thought: I found you.

She thought: I followed where you led.

She thought: I don't know yet what's at the seventh stop. But I know I'm going to be glad I followed.

She put the map in her bag.

Saturday was six days away.

She was ready.

She thought about the promise on the bridge — not hers, not a spoken one, but the kind that accumulated through the repeated choosing of the same thing. She had chosen, every Saturday, to come back. To carry the map forward. To be there.

He had done the same.

That was its own kind of promise. The most reliable kind — not made in a single moment but built over many moments, demonstrated rather than declared.

She thought: we have been demonstrating something to each other all autumn.

She thought: I am going to say it, after the seventh stop. Clearly. Without filing it under something else or managing it into a different shape.

I am going to say what I mean.

She thought: he will probably have already said it, in the language of what he does.

She thought: I know. I'm fluent now.

She went to bed.

Saturday was coming.

She was, for the first time in three years at Seika Academy, exactly where she wanted to be.

She dreamed about the map. Not a difficult dream — a good one. She was walking through Amahara and every street she turned onto was one she knew, and at the end of each street was the next one, and there was no wrong turn, and she wasn't alone.

She woke up and it was already light.

Five days to Saturday.

She got up and started her day.

She was ready for whatever the sixth stop held.

And she was ready for what came after.