The northwestern pass leading from Tsukimidai grew more treacherous with every step. The stones beneath Koyoi’s feet were shattered into shards so fine and sharp they seemed to defy the laws of the physical world.
Koyoi pressed the edges of her worn straw sandals firmly into the earth. She moved with deliberate care, focusing on her balance point to ensure she wasn't swept off her feet by a sudden slip. As the sun climbed, the mountain’s massive shadow began to retreat, but in its place, an ice-cold north wind rose from the valley floor, whistling with an ominous howl.
The wind carried a faint trace of the raw greenery from the forest they had left behind, but it was overtaken by the parched, dusty smell of dry earth drifting from their destination. Asahi led the trio without hesitation, tapping the exposed rock with the hilt of his greatsword to test its strength. Kuon followed at the rear, his sharp gaze searching for pursuers, staying close enough behind Koyoi to keep her pace steady.
The "Drop of Light," a gift from the God of Rain, pulsed quietly through the thick fabric of her drawstring pouch. It felt like a quiet proof that its master still lived, giving Koyoi just enough strength to sustain her exhausted body.
The path was startlingly narrow; on one side, it dropped away mercilessly into a valley so deep its bottom was lost to sight. The wind seemed to whisper a warning: one wrong step, and there is no coming back.
The stone steps eventually gave way to a crumbled slope. The rocks were slick with remnant rain and a thin layer of moss. Koyoi pressed her palm against a stone, the lingering moisture feeling grounding and calming her heart. Asahi reached out his hand, and she took it in silence.
She noticed old carvings in the rock, marks left by past travelers. As her fingers traced the grooves, she felt that those who came before must have shared this same primal fear. Looking at the marks, Kuon muttered, "Proof we’re nearing the Boundary."
To mark an unseen boundary upon the stone—perhaps people have always felt that need. Koyoi offered a small, silent thanks to the carvings.
Partway through the pass, they came upon the ruins of a small teahouse. Its roof had collapsed, leaving only pillars to sway in the wind. Soot stains on the walls spoke of the travelers who once bustled through this place. Koyoi touched a pillar, imagining their exhaustion.
Kuon scanned the surroundings while Asahi sat on a stone and unwrapped a small parcel. The dry aroma of rice balls filled the air, and Koyoi took a single bite. Kuon offered her a bamboo water flask; she thanked him and drank. The water was cold, slowly soothing a throat parched by the mountain wind. For a brief moment, the three sat in a silence broken only by the sound of the gale.
Koyoi found an old wooden plaque on the teahouse wall and brushed away the dust. The ink had faded, but the character for "Pass" remained vivid. She wondered how many travelers had looked upon that single word with hope or weariness. Touching the sentiment left behind, she offered a small prayer in her heart.
Gradually, the sound of rushing water from the valley grew louder. A faint aura of the River God drifted toward them, and the Rain God’s Drop responded in kind. Her grandmother had told her once: The Seam of the Boundary shimmers upon the water.
Koyoi opened her pouch and whispered a question to the Drop. It shivered, extending a warmth toward the river. Like water calling to water, the Rain God’s essence was reaching out. Kuon watched the exchange, concerned that the River God might be weakening.
"The protection holds," Koyoi answered, praying even harder in her mind.
Asahi stopped and pointed toward the distance. A white ribbon appeared at the bottom of the valley—the river, draped in a shroud of mist. Beyond it, clusters of small houses appeared as mere dots, with thin trails of smoke rising into the air. In that smoke, Koyoi sensed the presence of human life.
"The town is close," Kuon announced.
As they descended, the sky seemed to widen. The mountain ridges fell back, and the sheer height of the heavens pressed against Koyoi’s chest. She realized that the Seam of the Boundary must exist in the sky as well. Perhaps the path of the gods continued through the clouds.
High above, a single bird circled before diving into the valley. Its shadow flickered across the ground, and Koyoi squinted at its speed. In the direction the shadow fell, she caught a trace of fish on the air—proof of the river, and the familiar scent of the human world. To Koyoi, it made their journey feel tangibly real.
Kuon pulled a small shard of glass from his tunic and held it up to the light. The glass cast a faint rainbow; it was said the fluctuations of the Boundary manifested as colors through it.
"The shimmer is strong," he noted in a low voice.
Koyoi nodded. A vibration that no mechanism could measure was trembling within the glass—a signal that the world of the gods and the world of men were drawing close.
By the side of the road stood an old signpost. The ink was blurred by rain, but the arrow remained clear, pointing toward the descent to the river. Koyoi traced the arrow with her finger, returning her gratitude to the unseen presence watching over the path.
As the mountain ridges grew lower, their cover vanished. In the forest, the trees had been their shield, but here the sky was too vast. Koyoi felt a chill crawl down her spine, reminded of the Observer’s gaze.
"They are still far off," Kuon said softly. Even so, Koyoi gripped her pouch, fortifying her inner defenses.
A gust of wind kicked up grit. Asahi pulled up his collar, and Kuon wrapped a cloth around his face. Koyoi held her hair back, catching the scent of soot in the wind. The smell signaled the town’s proximity and loosened the tension in her heart.
Stone walls lined the slope, with tiny flowers blooming in the mossy crevices. Koyoi paused to look at them, moved by the strength it took to bloom at the threshold between mountain and town. Atop the walls ran a narrow path marked with the faint ruts of cart wheels.
"A human road," Asahi murmured, checking the width of the path as they proceeded.
Kuon stared into the shadows of the stone walls, searching for the places where the unseen fluctuations might hide. The Seam of the Boundary was invisible, yet he felt it dwelt in these very transitions. At the final bend of the pass, a train whistle echoed once more. The sound reflected off the mountainside before vanishing into the sky. Koyoi listened intently, imagining the unseen train. The road to the boundary town was being knit together by that sound.
The air grew thick with smoke, and a grain of soot touched Koyoi’s cheek. When she brushed it away, it left a black smudge on her fingertip. Asahi gave a small smile at this sign of human fires.
"On misty mornings, that sound carries even further," Kuon said. "The mist hides the Boundary, and the lights show the way. The town is a place that holds both."
A stone slipped beneath Koyoi’s foot, and she stumbled. Asahi instantly caught her arm, while Kuon supported her from behind. Koyoi exhaled sharply and thanked them. The pass was not kind, but the trio’s rhythm remained unbroken.
In that moment, Koyoi felt the warmth of their hands. She realized that not only the Rain God, but these human hands were her protection. The wind was freezing, but her heart was warm. The courage to stand at the Boundary was born from the steps they took together.
As they cleared the pass, the wind changed. A damp chill announced the river mist. Koyoi saw the Drop of Light glowing faintly, illuminating the path. A small bridge appeared at the bottom of the slope, its wooden railings gleaming softly. Beyond it, the river mist ebbed and flowed, blurring the houses on the opposite bank. She felt she was finally witnessing the overlapping of the human and divine worlds.
"Almost there," Asahi said, catching his breath.
"The mist is heavy... the Seam is close," Kuon whispered, narrowing his eyes at the shimmering fog.
"I understand. I’ll tread carefully. Let's go."
The Seam of the Boundary seemed to breathe within the mist, waiting for them. The path to the valley floor continued, the threshold swaying in the white haze. Koyoi fixed her gaze upon it.
The chill of the stones seeped through her sandals. The scent of water lingered in her throat, and the mist turned cold against her cheeks. With every breath, she counted the resonance of a bell in her mind and retied the string of her pouch.
"I’ll be fine," she whispered, and took the next step forward.