Synopsis: The Envelope From Nowhere
Ichiro Onda never did well with puzzles. He didn’t fail school, but always drifted when things grew odd. It’s June rains again, making Kaiyō City damp and sleepy. The day looked dull. Then, a yellow envelope dropped onto his family’s doorstep. His name was in plain handwriting. No address, no logo. Not even stamps. He touched it—cold. Did you ever notice something out of place right before summer break?
Ichiro stood there, sneakers pressed into the porch, as his mom watched from the kitchen. “Open it,” she said, drying her hands on her apron. “It says it’s for you.” He shook a little. “Feels strange,” he said. His fingers peeled it open. Smooth paper inside. Just a simple message: “Meet me on the old bridge at dusk. Bring no one. Tonight decides tomorrow.” He showed it to her. She smiled, but hid it quick. Was she worried or hiding pride?
Flashbacks come in bits. Every spring, things go missing—lost mittens, keys, even a soccer trophy. Ichiro starts to wonder if the envelope’s some game, or if he’s a target again. He shows it to his only friend, Hina Sakamoto, between noodles in the corner shop that smells like seaweed. She grins. “I say you go! It’s a good day to change life, huh?” He wants her to come. She’s firm: “‘No one’ means ‘no one’, dummy.” He tries to laugh, but can’t.
School rumors start up. By lunch, three kids give him a look, and one says, “Heard you’ll be rich by Friday.” He doesn’t even try to reply. Hina meets him at the club room. Her hair’s tied up, lips twitching in concern. He says, “If I die, erase my internet history.” She rolls her eyes. “If you die, who’ll feed my pet turtle?” Her teasing soothes him a bit. Things change: even the popular Yukito Ishimori, who never speaks, bumps Ichiro’s arm passing by and murmurs, “Keep hold of odd things.” Does this seem real, to you?
Six PM. The old bridge rests over the Murasame River, riddled with cracks and stains from decades, red flaking paint. Ichiro waits, envelope in bag, jeans damp from grass. The river runs below, brown and busy with reeds. He hears a shoe scrape. There’s a girl on the edge—long black hair, pale face. No one he’s met before. “Ichiro?” Her voice comes cold. He nods. “You wanted me?” She tips her head. “The city’s lost its memory. You find what’s gone missing year after year. Stuff vanishes always near you. Why?” 
He stumbles for words. “Don’t know. Lost things just come back to me someday.”
She pulls out a small blue notebook, pages worn, and opens it. “This,” she says, “is a ledger for choosing bridges.” He reads a page: lists of dates, tied to lost things kids talked about. His name isn’t rare—single lines, quick notes beside each. “Solve my puzzle,” she asks, “bring the right thing. City memory may come back. Bring the wrong or nothing, more will fade.”
He asks, “How will I know?”
She smiles almost sad. “That’s your first answer.” Then she points over the river. There, someone’s waving frantically—a dark shape frozen despite the wind. Hina. He calls, but no reply comes.
The girl leans close, just above a whisper, her voice both flat and haunting. “You may risk parts of yourself you never saw before.” She places a key in his hand—old iron, heavy as a lie. “Return noon tomorrow, alone. Or forget. Either way, someone vanishes.”
He wants to yell. He demands to know who she is. She just gives a hollow stare. “You met me every summer, Ichiro. You just never noticed.” Light falls through clouds, gold on water. Something burbles near the bridge, like the river’s changing mind.
As Ichiro looks down, the outline of a familiar trophy, once lost in third grade, shines half-buried in mud, echoing his half-buried memory.
He turns—she’s already gone. Will he come back tomorrow, knowing what vanishing might cost?
He stands on the bridge alone as the sky darkens. Water rolls below. The line between memory, dream, and the real feels thin.
Did you ever feel pulled into a test you didn’t sign up for? The breeze picks up, almost lifting the envelope from his hand. Ichiro clamps it shut. Maybe he’s just dreaming, or maybe his life’s taken a turn for the odd. 
Next, Ichiro needs to search his past, asking classmates for their losses, hoping to find what really ties these puzzle pieces. He goes home, not hearing the faint giggle near the bridge as his name fades in the breeze.
Is he the one meant to save their memories, or just another victim taken by the city’s kindness?
