There’s a town nearly lost to fog, called Mitsume. Mizuho Kariya lives there, a boy always drawn to odd things. Some weeks back, he found strings in his skin and nearly fainted. No doctors helped, not even the head nurse, Kana Ikejiri. Did you ever find something so unreal, you just hid it?
It’s not clear why these things start now. Whispering winds bring news: others wake, skin marked by black wires pulling at their bones. Kana tries not to scream as her arm pulses, bone too close to her palm. At school, Mizuho stares at his changing wrist in class, palming it each time Kaede Nakashima, his only friend, looks over. Mizuho wants to know what’s under his skin. He picked at the thread, broke the scab. It unravelled three nights in a row—now the string is thick, like vine. Flies stick to it. Did he make it worse?
Word spreads quick. Tsubasa Mori, who teaches biology, calls it contagious. He gathers students into the gym and locks the doors. “You’ll stay,” he tells them. Mizuho sees thin skin on cheeks everywhere, teeth poking under. Kaede sobs, tries to hide her twisted hand in her pocket. Is Tsubasa scared for them?
Late at night, Mizuho and Kaede sneak out. Each feels their bones grind if the wires stretch. In the medical bay, they find Kana—she has sewn her own arm shut. “It grows faster,” she says, weak. The three combine their knowledge. Kaede pulls out a photo: bodies with limbs sprouting, moving wormlike. They hope Tsubasa knows more.
By now, several are misshapen. Mitsume’s shrine pulses dim blue every night. Its priest tells those who’ll listen, “The curse won’t break by faith or cut hand.” Is he right? If so, who’s to blame?
Small parts in everyday life begin to switch. Do you turn to friends in trouble, or lock them out? Kaede shakes as black thread grows from her chest when she laughs—Mizuho tries not to blame himself for the spread, though it’s now in nearly half his class. One girl’s face falls off, replaced by a chessboard pattern. Kana insists the wires come from below town; a tunnel believed condemned since 1969 stirs the rumor. Faced with little choice, the gang heads out, their own bodies screaming alarm with each step.
Tsubasa guides them with shaky fingers. In the tunnel, the air is all metal and rotting cloth. Kana falters, thread bulging down her back. Mizuho nearly collapses when a sack-size plug forms on his belly, clear and angry. Kaede strips open her hoodie and shows roils of skin etched in new code. Is she even Kaede anymore? Are monsters born or made?
The final chamber throbs with thin, pulsing lights. Something in the air—spores, scents, raw feelings—shakes the group. Beneath the rib-arched roof, a cluster. It’s the root or mother, limbs fused by old veins. Kana gasps, whispers, “That’s me. That’s us.” As the ground thrums, the threads snap out, tangled together, knotting each to all. Some scream.
A wall splits open. Behind it pulses an old reel of film, cut open and bleeding tar. Mizuho can’t look away. Kaede crawls toward a length of arm she knows is hers, tries to pull it out—but smaller Mizuho faces appear inside each branching bough, blank and patient. Do you help, do you yank or do you run?
And then everything shakes. Kana clutches a photo from years before—shows Tsubasa as a boy, hand bandaged. “It’s his fault,” she says, voice very small. Before anyone can stop him, Tsubasa pushes his veins straight into the core. The last thing Mizuho sees is light filling Kaede’s mouth. Fade out. To be continued.
