A shelf remained on the second floor of the decaying building.
Half the walls had collapsed, and sand blanketed the floor. The shelves tilted precariously, most of their contents already swallowed by the drifts. Koyoi reached into a gap in the shelving and brushed aside the grit. His fingertips met the texture of leather.
It was a journal, small enough to fit in the palm of his hand, its leather cover dried and hardened with age. As he wiped away the dust, characters emerged on the surface.
Koyoi’s fingers froze.
“Shiori.”
The name left his lips. Though it was his own voice, it came out as if torn from deep in his chest.
“...It’s Shiori’s handwriting.”
Asahi looked back. Kuon approached, peering over his shoulder at the journal. The name on the cover hadn't been written in ink; it was carved with a blade, etched deep so that it would never be erased, even if scoured by the sands.
Koyoi opened the journal. White pages spread before him. Nothing was written there. He flipped to the next page, and the one after that. Every single one was blank.
“It’s empty...”
Koyoi’s voice withered. His hopes had risen too high, and the drop hurt all the more, the disappointment carving a hollow in his chest.
Kuon reached out.
“Let me see.”
Kuon licked his fingertip and slowly traced the surface of a page. His finger stopped.
“There are grooves.”
“Grooves?”
“It’s not ink. Someone used a sharp point, pressing down hard into the paper. It's a method that leaves only indentations—invisible to the eye, but clear to the touch.”
Kuon brought the pale blue glow of his artificial eye close to the page. He tilted the book, trying to catch the faint ridges and valleys in the paper’s surface with the light. But the indentations were too shallow.
“Can you see anything?” Asahi asked.
“I can tell there are lines, barely. But I can't make out the overall shape.”
Koyoi looked down at his drawstring pouch. The Shizuku was pulsing. It was warm. Ever since he’d found the journal, its temperature had been rising.
Koyoi placed the pouch directly onto the journal. The warmth of the Shizuku seeped through the leather and into the paper. A few seconds of silence followed. Then, a faint glimmer raced across the surface of the page.
The indentations were reacting to the heat of the Shizuku. Lines of pale light traced the marks, manifesting shapes upon the once-blank page. Lines and dots. Intersecting paths. Three circles.
“A map,” Kuon whispered. The aperture in his prosthetic eye opened wider, the blue light tracking the map's details.
“It shows paths connecting three towns. Not the main roads... hidden trails. Routes beyond the sight of the Observers.”
Koyoi held the journal with both hands, keeping the pouch pressed against it so the light wouldn't fade. The lines of the map were delicate; it felt as if they might vanish the moment he pulled the Shizuku away.
“Shiori didn't use ink,” Kuon said quietly.
“Ink can be read by the Observers. So she recorded it through indentations alone. A map that only reveals itself to the heat of the Shizuku... knowing, from the start, that it would be you who found it.”
Koyoi’s eyes grew hot with tears. His grip tightened on the journal. Shiori had been here. She had stood before this very shelf, carving this invisible map in the belief that Koyoi would one day reach it.
In the center of the map, there was a single word. The light was weak, the outlines blurred. Koyoi pressed the pouch harder. The Shizuku responded, its temperature rising a fraction more. The characters surfaced.
Scripture Repository.
A single point where the hidden paths between the three towns intersected. In that place, Shiori had left only those two words.
Asahi peered at the journal and let out a short breath.
“Now we have a way.”
Koyoi pulled the journal to his chest. The hardness of the leather and the warmth of the Shizuku overlapped. Every single groove pressed by Shiori’s fingers was transmitted to Koyoi’s palm.
“...You were waiting for me.”
His voice was small, fragile enough to be swept away by the sandy wind. But that was fine. The person who needed to hear it had already been reached.
The Shizuku inside the pouch gave one final, strong pulse. The light on the journal slowly faded, but the path remained etched in his memory.