Chapter 1: The Ghost in the Classroom

The clock in the central courtyard of Kurogane Academy ticked backward. It was a subtle thing, a heavy iron hand jerking counterclockwise once every sixty seconds, but no one ever looked up long enough to notice.

In Class 2-B, sunlight spilled across thirty-one desks. Thirty-one students sat in neat rows, their dark blue uniforms pressed, their notebooks open, their eyes fixed on the blackboard where equations governing Aether stabilization were written in chalk.

There was a thirty-second desk.

It sat in the far corner, beside the high arched window where the dust motes hovered like suspended glass. A boy sat there with his chin resting in his right hand, his gray eyes fixed on the courtyard below. His name was Kaito Mori.

A sparrow landed on the windowsill outside. Kaito reached out a hand, his long, slender fingers lightly brushing the thin glass pane. Attached to the sparrow’s tiny, frantic heart was a faint silver line—a Thread of Existence, shimmering like spider silk in the afternoon light. Beside it was a second line, pale blue and vibrating with the tiny creature’s panic. A Thread of Emotion.

Kaito pinched his thumb and forefinger together, mimicking the motion of a pair of scissors, and made a tiny snipping motion in the empty air.

The pale blue Thread snapped.

On the windowsill, the sparrow stopped trembling. Its heart still beat, its breath still puffed in tiny clouds against the chilly mountain air, but its fear was gone. It cocked its head, stared blankly at Kaito for two seconds, and then hopped onto his outstretched index finger through the open notch of the window.

Kaito sighed and flicked his wrist. A faint pulse of gray light left his fingertip, re-tying the pale blue Thread back to the bird’s chest. Instantly, the sparrow burst into a flurry of panicked feathers, chirping madly as it hurled itself back into the sky.

“Consuming emotional Aether without a designated catalyst leads to rapid destabilization,” the teacher, Professor Stern, said from the front of the room. He was a tall man with sunken cheeks and a uniform pinned with three silver stars. “Remember this for the upcoming practical exam in the Grove. If you fail to anchor your own Thread of Emotion during a Hollow encounter, the Aether will consume you from the inside out.”

Professor Stern walked down the center aisle, his heavy leather boots clicking against the polished hardwood. He passed Kaito’s desk without pausing. His eyes swept right over Kaito, taking in the empty space between the desk and the window, treating the chair as if it were nothing more than air.

Kaito didn’t blink. He was used to it. He had been used to it for two years.

Two years ago, Kaito had possessed a mother, a home, a name that appeared on the school roster, and a seat in the front row. Then someone had cut his Thread of Existence. He remembered waking up on the damp stone floor of the courtyard with a hole in his chest where his connection to the world used to be. When he walked into his dorm, another boy was sleeping in his bed. When he called his mother, the line rang until an automated voice told him the number did not exist. When he sat at his desk, the teacher marked him absent, then simply removed the desk from the official seating chart.

He was Forgotten. He existed in the physical world, he ate food from the cafeteria when the cooks turned their backs, and he slept in an abandoned attic above the library. But in the minds of humanity, he was a blank space, a smudge on a window that everyone subconsciously looked past.

To live as a ghost was not entirely terrible. It was quiet. It gave him time to watch.

Below in the courtyard, three students walked along the cobblestone path. At their head was Ren Arakawa, the Student Council President. Ren walked with the sharp, effortless precision of a blade being drawn from a sheath. Above his head, his Threads were not silver or blue; they were thick, jagged cords of pitch-black Aether that seemed to chew at the edges of the light around him.

Beside Ren walked a girl with long, silver-white hair tied back in a crimson ribbon.

Yuki Tsukimori. The academy’s star. The Light Weaver.

Kaito watched her. She was laughing at something the girl beside her—Hana Sato—was saying. Her Threads were radiant, a blinding tapestry of gold and white that radiated warmth even from three stories up. But Kaito’s eyes narrowed as he traced the golden line rising from the crown of her head toward the sky.

Her Thread of Fate was fraying.

It was a terrifying sight. The central cord was split into hundreds of hair-thin strands, each one snapping quietly, one by one, drifting away into the atmosphere like burning embers. Every step she took, every time she smiled, a microscopic fragment of her life dissolved. She was dying, slowly, spectacularly, in full view of a world that worshiped her.

She has six months, Kaito thought, his deadpan expression unreadable as he traced the frayed golden fibers with his gaze. Maybe seven if she stops using her power. Which she won’t.

“Class dismissed,” Professor Stern called out, shutting his textbook with a dull thud. “Review the third chapter on Thread Manipulation. And do not wander near the northern border of the Grove after dusk. The perimeter wards are being reinforced.”

The classroom instantly burst into a chaotic noise of scraping chairs, rustling papers, and teenage chatter. Students gathered their leather satchels, arguing about dorm curfews and cafeteria menus.

Kaito remained seated. He always waited for the room to clear. If he walked through a crowd, people would bump into him, stumble, look confused for a fraction of a second, and then rationalize the collision as a trip or a draft of wind. It was easier to wait.

Slowly, the room emptied. The chatter faded down the stone corridor. Professor Stern packed his leather briefcase, extinguished the oil lamp on his podium, and walked out, locking the door behind him with a heavy iron key.

Kaito sat alone in the dimming afternoon light. The sun was dropping behind the jagged peaks of the mountains, casting long, bruised-purple shadows across the classroom floor.

He leaned back in his chair, stretched his arms over his head, and reached into his jacket pocket to pull out a small piece of dried bread he had snagged from the kitchen that morning.

Clack.

The classroom door handle turned.

Kaito didn’t move. Teachers often came back for forgotten papers, or janitors came to sweep. They would walk around his desk without ever realizing he was there.

The door swung open.

Yuki Tsukimori stood in the doorway.

She was out of breath, her cheeks flushed pink, her silver hair slightly disheveled as if she had run all the way from the courtyard. Her hand rested on the brass doorknob, her chest heaving softly under her dark navy uniform jacket.

Kaito took a slow bite of his bread, staring at her with deadpan indifference. She forgot her notebook, he reasoned silently. It’s usually in the third desk of the middle row.

Yuki didn’t look at the middle row.

Her bright amber eyes swept past the podium, past the blackboard, past the rows of empty chairs, and locked directly onto the far corner of the room.

Directly onto Kaito.

Kaito froze, the piece of bread halfway to his mouth.

Silence hung in the air, heavy and absolute, broken only by the faint, backward tick-tock of the clocktower outside.

Yuki took a step into the room. Then another. Her leather shoes clicked softly against the wooden floorboards. She walked straight past her own desk, straight past the front of the room, until she stood less than three feet from Kaito’s desk.

She bent down slightly, resting her hands on her knees, her amber eyes level with his.

“You’re eating in class,” she said. Her voice was clear, soft, and slightly trembling. “And it’s three hours after the final bell.”

Kaito stared at her. He didn’t blink. He lowered his bread very slowly and looked behind himself, checking to see if there was a stray cat, a lingering spirit, or a mirror reflecting someone else behind him.

There was only the stone wall and the window.

“Are you talking to the wall?” Kaito asked. His voice was raspy from disuse, a quiet, dry thread of sound. “Because if you are, the wall has a very strict policy against visitors after five.”

Yuki’s lips twitched into a small, fragile smile, though her eyes shone with a sudden, overwhelming moisture. She let out a breath that sounded half like a laugh and half like a sob.

“I’m talking to you, Kaito Mori,” she whispered.

The bread slipped from Kaito’s fingers, falling onto the wooden desk with a tiny, dry tap.

The world seemed to stop. The faint wind outside died down. The dust motes in the air froze.

Kaito stared at her, his deadpan mask cracking for the first time in two years. His gray eyes dilated. He could see her Threads clearly—the brilliant golden weave of her Light, the fraying scarlet cord of her Fate—but between her chest and his, there was something else.

A Thread he had never seen before.

It was thin, almost transparent, woven out of pale silver and deep violet Aether. It connected her heart directly to his sternum. It was taut, vibrating with a low, resonant frequency that he felt deep inside his ribs.

“How?” Kaito asked softly. His voice lacked its usual dry composure. “No one remembers. The Thread of Existence was cut. I don’t exist.”

“I know,” Yuki said. She took one more step closer, reaching out a slender, pale hand. Her fingers hovered an inch above his cheek, close enough for him to feel the radiant heat of her Aether. “I watched them do it. Two years ago, in the courtyard. I saw the black shears. I saw you fall. And then… everyone stopped looking at you.”

She swallowed hard, tears finally spilling over her dark eyelashes, tracing hot paths down her cheeks.

“I tried to tell them,” she continued, her voice breaking slightly. “I told Professor Stern. I told my roommates. I told the Student Council. I yelled your name in the middle of the cafeteria. But every time I said ‘Kaito,’ they just stared at me like I was speaking a dead language. After three weeks, I realized… if I kept screaming, they were going to lock me in the sanatorium at the bottom of the mountain.”

She looked down at her own trembling hand, then looked back up into his eyes.

“So I stopped screaming,” she said softly. “And I just started watching. I watched you sit in this corner every day. I watched you steal apples from the garden. I watched you fix the broken Thread of that stray black cat behind the dorms last winter. I watched you… be completely alone.”

Kaito sat motionless. A strange, cold ache bloomed in the center of his chest—a long-dormant pain that had been numb for seven hundred and thirty days.

“You’re an idiot,” Kaito said deadpan, though his gray eyes were wide. “If the Academy realizes you can see a Forgotten, they’ll cut your Thread too. You should have kept pretending I was air.”

Yuki let out a genuine, breathless laugh, wiping her tears away with the back of her sleeve. “I tried. Really, I did. Two years is a very long time to pretend a person isn’t sitting three feet away from you. But today…”

She reached into her jacket and pulled out a small, faded wooden button. It was chipped at the edge, tied with a bit of frayed navy thread.

“You dropped this during winter break last year,” she said softly, placing the button on his desk right next to his piece of bread. “I’ve carried it in my pocket every single day. And today… I saw your Thread of Fate pulse. Just for a second. It looked like it was trying to reach out to something. So I ran.”

Kaito looked at the button, then at the silver-violet Thread connecting their chests.

He didn’t know how to weave emotion. He didn’t know how to weave warmth. For two years, he had only known how to cut—snapping the agonizing threads of despair from dying birds, severing the lingering attachments of hollowed-out things in the dark.

He reached out, his long fingers gently touching the wooden button.

“My name is Kaito,” he said quietly, looking up into her golden eyes. “Just Kaito. I don’t think I have a last name anymore.”

“I know,” Yuki whispered. “I’m Yuki.”

“I know who you are,” Kaito said, his voice returning to its faint, sarcastic edge. “You’re the girl who gets perfect marks in Thread Stabilization and breaks three teacups every morning because she’s impossibly clumsy.”

Yuki blushed bright red, stepping back indignantly. “Hey! That was a secret!”

“Nothing is a secret when you’re a ghost,” Kaito replied dryly. He picked up his piece of bread, broke it in half, and held out the larger piece toward her. “Dinner?”

Yuki stared at the dry piece of bread, then looked at his quiet, calm face. A brilliant, blinding smile broke across her features, warmer than all the golden Aether in her body.

“I’d love some,” she said.

Before she could take it, a sudden, violent shudder rippled through the floorboards.

The glass in the arched window rattled violently. Down in the courtyard, the backward-ticking clock stopped dead on the twelfth hour.

A sound echoed from the dark forest surrounding the school—a wet, tearing screech that sounded like thick canvas being ripped apart by iron teeth. It was a sound that made the hair on the back of Kaito’s neck stand up.

The sky outside turned a sickly, bruised shade of purple.

“The Grove,” Yuki whispered, her smile vanishing instantly, her hand darting to the silver hilt of the Weaving Shears strapped to her waist. “A barrier broke.”

Kaito stood up slowly from his desk. He didn’t draw a weapon. He didn’t have one. He simply adjusted his dark grey collar and looked out the window toward the towering pine trees at the edge of the school grounds.

Rising from the treeline was a massive, writhing shape made of black, oily smoke. It had no eyes, no face, only a hundred long, twitching tendrils made of jagged gray Thread. It was a Lesser Hollow, but it was growing rapidly, drawing in the cold evening air and exhaling a thick fog of pure human despair.

And attached to its core was a Thread Kaito recognized.

It was a faded pink Thread of Emotion—the exact same shade as the hair ribbon worn by a girl who used to sit in the front row of Class 2-B three weeks ago. A girl who had vanished from the dorms, whose bed had been cleared out, whose name had been erased from the register.

She didn’t transfer, Kaito thought, his eyes turning cold and sharp as glass. She graduated.

“Kaito,” Yuki said, her light Aether flaring around her hands in a blinding aura of gold. “We have to alert the Student Council. The perimeter guards—”

“They won’t get there in time,” Kaito interrupted calmly. He walked past her toward the door, his movements fluid and soundless. “And if Ren Arakawa gets there first, he won’t save her. He’ll just cut her out of the world completely.”

Yuki blinked, stunned. “Her?”

“Come on, elite,” Kaito said, tossing the half-eaten piece of bread onto his desk and stepping into the dark corridor. “Let’s go see what happens when a ghost fights a monster.”

The air in the Grove was thick with the smell of ozone and rotting pine needles.

The Grove was a sacred forest, surrounded by tall iron fences engraved with protective runes, but right now, a ten-foot section of the fence was bent inward, the iron twisted like soggy cardboard.

The Lesser Hollow towered fifteen feet high, its smoky body thrashing against the ancient oak trees. It emitted a high-pitched, warbling howl that vibrated in Kaito’s teeth.

“Hold your ground!” a voice shouted from the shadows.

Three third-year Weavers stood in the clearing, their silver shears glowing with pale blue light. They were throwing threads of light toward the beast, attempting to bind its limbs, but the smoky tendrils snapped the light cords like dry twigs.

“It’s too strong!” one of the students screamed, falling backward into the mud as a smoky tendril slashed across his shoulder. “Its density is off the charts! It’s consuming the perimeter ward’s Aether!”

Yuki burst through the treeline, her hands glowing with brilliant golden light. “Thread of Light: Ninth Stanza—Luminous Cage!”

She thrust her hands forward. Eight thick cords of pure golden Aether shot from her fingertips, crisscrossing through the air and plunging into the earth around the Hollow. A radiant cage of golden light erupted upward, pinning the beast’s smoky limbs against the ground.

The Hollow screeched, thrashing violently against the golden bars.

“Yuki!” one of the injured students yelled in relief. “You brought back— wait, who are you talking to?”

Yuki glanced back toward the treeline.

Kaito was standing in the shadows of an ancient pine tree, completely unbothered by the roaring wind and the surging dark Aether. To the injured students, Yuki was looking at an empty patch of mud.

“Focus on the cage!” Yuki shouted to them, her brow furrowed in concentration. Sweat dripped down her temple. Kaito could see her golden Thread of Fate fraying even further, tiny glowing threads snapping away into the dark forest air. Cost, Kaito thought coldly. Every spell costs her life.

“I can’t hold it!” Yuki gasped, her knees trembling as the Hollow slammed its massive head against the golden bars, cracking them. “Its core is too dense! I can’t reach the heart to purify it!”

“You don’t need to purify it,” a flat voice said right beside her ear.

Yuki jumped slightly as Kaito stepped out of the shadows, standing right beside her within the light of her cage.

He looked at the writhing monster. Where others saw a cloud of terrifying smoke and red eyes, Kaito saw the tapestry underneath. He saw the tangled, knotted mess of thousands of dark gray Threads of Despair, wrapped tightly around a single, fragile, fading pink Thread of a human soul.

The girl inside was crying. He could hear her voice in his head—a faint, echoing whisper: It hurts… it’s so cold… I don’t want to be forgotten…

“Kaito,” Yuki panted, her gold light flickering. “I can’t cut the despair without cutting her soul! If I cut the pink thread, she dies!”

“You cut with shears,” Kaito said softly.

He raised his right hand. He didn’t hold a weapon. He didn’t have silver shears or glowing golden Aether.

He simply extended his index and middle finger, sliding them into the empty air between the golden bars of the cage.

To Kaito’s eyes, his fingertips bled a strange, silent color—not light, not dark, but the deep, velvety gray of an unlit shadow.

“Shears cut everything,” Kaito murmured, his gray eyes shining with an ancient, cold clarity. “A shadow only cuts what it touches.”

He slid his gray fingers through the tangled mass of black Despair Threads, completely ignoring them. His fingers didn’t slice the dark energy; they passed through it like a hand sliding into cold water.

He reached the center. He gently pinched the fading pink Thread of the girl’s soul.

Beside it were four thick, parasitic black cords—the Threads of the Hollow, leeching her life force away.

Kaito snip-snagged his fingers.

Snap. Snap. Snap. Snap.

It made no sound in the physical world. There was no flash of light, no explosion of Aether, no grand wave of power.

There was only a sudden, absolute silence.

The four black cords severed simultaneously.

The massive, fifteen-foot monster stopped screaming. Its smoky, terrifying form froze in mid-air. Then, like a sandcastle hit by a high tide, the dark smoke simply collapsed, dissolving into harmless gray dust that scattered into the pine-scented wind.

Falling from the center of the dust was a pale, unconscious girl in a torn school uniform.

Yuki reacted instantly, dropping her golden cage and leaping forward to catch the girl before she hit the muddy ground.

The three injured third-year students stared in absolute, dumbfounded shock.

“The… the Hollow…” one of them stammered, scrambling to his feet. “It just… vanished? How? Did your cage purify it, Yuki?”

Yuki knelt in the mud, holding the unconscious girl in her arms. She checked the girl’s pulse—it was steady and warm. The faded pink Thread on her chest was intact, slowly brightening as it drew in clean air.

Yuki looked up, her golden eyes wide with awe, searching the shadow of the pine tree.

Kaito was already turning away, his hands shoved deep into his uniform pockets.

“Yuki!” another student called out, running up to her. “That was incredible! You erased a Lesser Hollow instantly without even using a Executioner’s Weave!”

“It… it wasn’t me,” Yuki whispered, looking down at the girl in her lap, then back toward the dark forest path.

“What are you talking about?” the student asked, looking confused. “There’s no one else here.”

Kaito walked slowly back down the dirt path toward the main building, his steps silent against the fallen leaves.

In his right pocket, his fingers were trembling violently.

He pulled his hand out and looked at it in the moonlight. The skin on his middle finger was turning pitch black, the flesh cold and numb, as if it had been dipped in liquid nitrogen.

The cost, Kaito thought, a small, deadpan smirk touching his lips. Every time I cut a Thread without an anchor, my own existence gets a little thinner.

He looked up at the backward-ticking clocktower looming over the dark roofs of the academy.

He had saved a girl tonight. He had revealed himself to Yuki. And in doing so, he had drawn the first thread of a web that would inevitably drag him into the deep, dark stomach of Kurogane Academy.

Behind him, a light footstep sounded on the damp leaves.

Kaito stopped, but he didn’t turn around.

“You move very quietly for a dead man,” a cold, smooth voice said from the darkness under the trees.

Kaito tilted his head slightly.

Standing on a high branch above the path was a boy with slicked-back black hair, wearing a white Student Council coat draped over his shoulders. His dark eyes were cold, calculating, and empty of all emotion.

Ren Arakawa.

Ren leaned against the trunk of the tree, looking down at Kaito with a strange, dangerous glint in his eye. He didn’t look past Kaito. He didn’t look through him.

He was looking directly at Kaito’s throat.

“I felt a Thread snap,” Ren said softly, reaching into his coat and drawing a pair of long, obsidian-black shears that absorbed the moonlight like a sponge. “A Thread that wasn’t supposed to be cut by anyone in this school.”

Ren dropped from the branch, landing silently on the stone path ten feet in front of Kaito.

“Tell me, ghost,” Ren murmured, raising his black shears, his voice dripping with dark intrigue. “Who taught you how to cut the ties of Fate?”

Kaito stood still in the moonlight, his expression returning to its usual quiet, deadpan calm. He slowly pulled his hand from his pocket, his blackened fingertips resting lightly at his side.

“Nobody taught me,” Kaito said softly. “I just learned that when you’re forgotten… you don’t have to follow the rules anymore.”