High school always feels slow for Ao Kiryu. He spends lunch with his two strange friends: violet-haired Jin, who’s always sketching, and Mayu, who doesn’t go outside much. Most days, Ao watches the sky and daydreams. Then, one Thursday, Ao sees a cat with odd thread tied to its tail, darting between shoe lockers after the last bell. Nobody else seems to notice. “You saw that?” Jin asks, closing his rusted sketchbook. His green eyes are small, careful. So starts a day that changes their slow routine.
Curious, Ao follows the cat behind the Chemistry Hall, out to the quiet alley by the school wall. Mayu joins, soft-jawed and pale, her school bag like a shield. They spy the cat circling a thin gap in the bricks, trying to gnaw off the glowing blue thread. “Wild cat shouldn’t tangle with monsters,” Mayu whispers, strangely sure. She locks eyes with Ao. Do small things go missing in your school too?
Ao asks if they’re talking about curses. Jin murmurs, “Old game. Nobody talks about it. Not since Sho vanished in autumn.” Ah, urban legends. He pushes Mayu’s trembling hand away. “Touch the thread and wish. School says the wish comes true for a day. Something else steals something from you.”
Jin dares Ao to try it first. Ao hesitates, but a deeper pull makes him move closer. As he steps forward, the alley darkens. A chill creeps over his arms. Instinct tells him this isn’t wise. Mayu pulls him away just in time, but in her hurry, catches the thread herself. Shadows bend. Nothing happens—except, after she lets go, her shadow’s a beat behind her own limbs.
That night, Ao tosses. Did Mayu really lose her shadow? At morning roll call, her skin draws less light, eyes a bit too shiny. School grumble runs through whisper: “Blue Thread. Another kid gone blank.” Jin slags off class. Ao finds blue threads stuck on his shoes, too.
The more Ao tries to ignore it, the more honed-up oddness surfaces: missing snacks, foggy locker interiors, decorations swapped for wrong seasons. Teachers act slow, like their words don’t fit right. On the roof, Ao and Jin debate what the thread is. Petty curse? Test for the scared? Mayu stands apart, quieter now. What’s she really lost? Has she changed more than she lets on?
Word gets out that the principal plans to fence the whole Chemistry wing because of the ‘broken’ cats. The blue-threaded cat limps, avoiding every open space. Ao and Jin try to track it with old lunch fish, but the cat trips back into the alley by dusk. Jin sketches doodles on its fur, his fingers brushing the thread. Everyone asks—what if you break the thread instead of using it?
Mayu stops them: “Tie it twice. That’s what you do with loss.”
Her deeper shadow tears free when the sun sets. It stalks the wall as a second Mayu, with quiet, scratchy footsteps that zig and stop. This shadow Mayu tries to talk, but her voice is the sound of carpet scraping tile. If you were Ao, would you be scared or try to help your friend?
They race to set things right before sunrise. It gets harder. With every wrong knot tried, school’s pressed in by thread—benches, mop brooms, even an old gym shoe are tied together. Students and staff start to forget whole days. Faces don’t match names. In locker #12, Jin finds an old class list with a missing name and half a blue thread “tail.” Spirits grow prickly: the price for yes or no is growing. Should they risk cutting their parts away and maybe lose even more?
Finally, sunrise throws long shapes through the gap. Mayu understands her own double—one quiet nod, and the shadow lets them re-tie her blue thread. Ao offers his own wish, not for himself but for both his friends: “Let forgotten things be remembered, even if it hurts.”
The alley flares with morning gold. The thread on the cat snaps, drops onto Mayu’s feet, who draws both shadows in with a step. Her hair ripples back to its old olive color. For five seconds, nobody blinks. Students file in not knowing what waited in the dark lanes. School resumes. Mayu forgets less, but walks slower now, like she’s made friends with her old self’s quiet aches.
Ao opens his shoe locker to find tiny blue scraps inside—a start, or just the last leftover? Jin tears out the cat-sketch sheet from his old notebook, and posts it on the tack board near Classroom 2-A. The cat’s tail is fixed, and the world keeps turning, but not every change resets. Quiet footfalls echo after Ao, though, in shadowed halls.
How much would you risk to bring back what’s gone—for your friend, or a stranger? Would it matter if what returns is strange, or if you’re wrong about the price? As class begins, Ao glimpses a tail’s end, blue thread vanished, but the echo in his steps holds a promise—and a hint the story’s not quite done.
It’s a long wait for next Thursday’s sun.
