Airi runs up the narrow street, her bag swinging as she yells, “I’m gonna be late, again!” Wind whips her hair. Today’s not just any day — it’s the annual Promise Festival, where friends vow to stand by each other with a custom of tying their shoe strings together. Her nerves race almost as fast as her feet.
Kenta waits outside school. He juggles a camera and two juice boxes. He’s thinking: will things be the same for them after he moves away this month? Haruka, who chats with every kid in class, stands by, holding triple-flavored dango she bought, saying, “You better not trip and ruin the festival for us, Kenta!” Everyone knows she worries, but her words edge in kindness every time.
The festival starts. Friends pair off under paper lanterns, knots forming, loud laughter mixing with the street drums. Each knot stands for a secret vow only the friends know. Airi and Kenta remember their promise from years back — “We’ll help fix any fight.” Do you recall the last time you made a real vow to someone? The group of three presses in to decide their tying order. 
Trouble rides in when Ren, once close but lately distant, eyes the trio from across the stage. Haruka, bold as ever, says, “Let’s call him over.” Kenta hesitates, chewing on a thought, but Airi waves Ren in.
“Are you ready, Ren?” she asks — calm and open. Tension breaks for a beat.
He won’t look at anyone. “Why should I? It’s dumb.”
Haruka’s face clouds, but Airi kneels and unties her old strings: “Why did we drift?” Kenta edges in, uncertain if he should speak.
They try to ask: was it a fight, a slow slip away, or pride? Silence falls. Haruka finally bursts, accidentally pulling her dango apart. What is it that keeps friends from just saying sorry?
An elder stands by. Her festival sash shines in the gold lamplight. She tells the crowd, “Loose ties can always be re-tied, if both people pull.” Does that spark something inside you too?
The main contest starts. Pairs and teams must run together, shoes joined, trust everything to their friends. Airi grabs Kenta and, after a nudge, Haruka links with Ren. Friction at each stride, they bicker yet grin at each other when their legs tangle. 
Halfway, Ren falters. “I’m slowing you down,” he mumbles, feet dragging. Kenta stops the string-knot at his shoes, crouching to meet Ren’s eyes: “But we’re tied, you dolt. If you stop, we all stop.” The drumbeat smashes time — can you hear the slip in Ren’s voice? “I missed being with you guys.” Airi gently ties their shoes tighter. Their clumsy sprint heads for the finish as the crowd claps harder for the slowest trio.
After, sweat shines on four faces in lantern light. Kenta clicks a group photo. “There,” he smirks, “can’t break a string that easy.”
Haruka links pinkies with Airi, squeezing tight, whispering, “Promise again?” All four laugh — promises, ties, challenges — sometimes all a friend needs is a little effort, simple words, and a soft knot.
The sky darkens as festival sparks pop silent shapes overhead. Ren steps up, gripping the old shoestring tight. Kenta’s phone buzzes — a message from his parents: “Leaving next Friday.” As the laughter dies down into hope and old aches, Airi grips everyone’s hands. “Let’s not wait so long next time,” she says, voice low but free. 
Offscreen, someone shouts there’s a firework mishap — is this peace real, or does trouble burst even louder tomorrow night? The arc echoes into the next tale, knots unfinished, longing cut by joy, one string short but holding. Who knows how strong the next promise will be?
