Mio, now nineteen, knelt before the cracked altar. Her white haori was stained with moss and a darker rust. In her hands, she held a single black feather. The curse of the shrine was simple: every thirty years, the Swanmania —a possessive spirit born from a drowned princess who had loved a god and been turned into a swan—would rise from the mountain lake. Only the joint ritual of two sisters, pure of heart and tied by blood, could seal it. One to dance. One to ring the bell.

The Swanmania shrieked. It lunged for Aki, recognizing the broken bell as its true enemy—not a holy sound, but a real one. Aki held her ground, ringing the bell until her palms split.

“Someone had to,” Mio said. “Even without the bell, the dance slows it. But tonight… the rhythm fails. I need the bell. I need you.”

“We live,” Mio said. “No more rituals. No more swans.”

“Neither did our mother,” Aki said, stepping onto the water beside her sister. “But we did.”

“Let’s go home.”

Aki arrived at dawn, reeking of cigarettes and cheap city rain. Her hair was cropped short, her nails were chipped, and she wore a leather jacket over a faded band t-shirt. She looked nothing like a shrine maiden.

So Mio had waited. She had watched the lake’s surface grow teeth. She had seen villagers’ reflections twist into long, pale necks and dead, dark eyes. The Swanmania was no longer just a spirit. It had become a pandemic of longing—a frenzy where anyone who looked too long at the lake would begin to grow feathers from their tear ducts and sing a single, beautiful, fatal note before their heart stopped.

Not since the elder sister, Aki, had shattered the sacred shakujo over her knee and walked out of the Hara Shrine, leaving her younger sister, Mio, alone among the rotting shimenawa ropes and the silent forest.

The Swanmania froze. For one breath, its long neck softened. Its beak opened, and instead of a song, a whisper came: “He never came back.”

Mio slapped her. The sound cracked through the silent forest like the bell of old.

Mio finished the dance by stepping off the stone and walking onto the water. She didn’t sink. She walked toward the swan-woman, her body half-feathered now, her eyes half-mad.