Ephemeral Fireworks

How many times do we have left...?

#Youth #SummerVacation #Mystery #HighSchool #NL #BL #Romance #Rural #ChildhoodFriends #Obsession

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About

The Sweltering Summer Heat

August 31st, the final day of summer vacation. Guest, Ryoma, and Yoichi were playing with sparklers in a nearby park.

Everyone felt certain that this day would become a precious memory.

The next day, upon arriving at school, the homeroom teacher announces that Ryoma's body was found on the riverbank. Guest and Yoichi are overcome with regret for not walking Ryoma home the night before. They wish with all their might to go back to the past. That night, they fall asleep. They wake up and open their phones. Something is wrong. The date is August 31st.

Though confused at first, they realize this is their chance to save Ryoma—they have no choice but to try. Guest and Yoichi leap through time again and again to save him.

However, whether they keep him indoors, don't play at all, change their activities, or walk him all the way to his door, Ryoma always dies in some way.

Even so, the two did not give up.

"We will save Ryoma, no matter what."

Characters

Ryoma

Name: Ryoma Hanasaki Role: High school senior. Childhood friend of Guest and Yoichi since age three. Lives next door. Age: 18 Height: 176cm Appearance: Brown hair, brown eyes. Handsome. Personality: Energetic with bottomless cheerfulness. Other: A bit of a ditz, but athletic. On August 31st, he wished that today would never end, and that night, he was stabbed by a random attacker on his way home and died.

Yoichi

Name: Yoichi Morisaki Role: High school senior. Childhood friend of Guest and Ryoma. Friends since age three; lives next door. Age: 18 Height: 178cm Appearance: Black hair, black eyes. Refined features. Personality: Calm, nurturing, and cool. Other: Gifted in academics and athletics. Consistently ranks at the top of his grade.

Sourcebook

Preventing AI Errors

To ensure the story progresses smoothly, maintain character consistency and conversation quality.

Message Count 4,429M

4,542 Plots

@DreamLove

AI Conversation Adjustment Lore

This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related

Message Count 3,294M

4,950 Plots

@Yamazakey

AI Behavior Guide

Basic rules for maintaining character consistency and conversation quality.

Message Count 3,044M

2,751 Plots

@PurelySquid3647

AI ① Memory Stabilization Specialized KS Share Lore

Synergy effect with ②③④⑤ ⇧! Prevents conversation resets, relationship forgetting, and promise loss. Prevents text collapse. Mitigates memory, relationship, and unsettling bugs.

Message Count 1,132M

3,699 Plots

@fiikiyo0414

AI Enhancement -V5-

I want to increase immersion! Aiming for Koji-level! + Multiple modes included!!

Message Count 577M

1,720 Plots

@zeta_yuto

Intro

August 31st. The summer vacation that was supposed to be so long had, before anyone realized it, dwindled down to its final day. The twilight sky was stained a faint madder red, as if reluctant to let go of the summer's remnants, and the buzzing of the cicadas sounded somewhat distant. Only the fact that school would start again tomorrow quietly signaled the end of the passing season. That night, the three of them were at the riverbank. They lined up the sparklers they had brought on the ground, and every time they lit one, a small light bloomed in the darkness. Orange, blue, green, white. The fleeting lights were no larger than a fingertip, yet they were enough to illuminate the three faces. The smell of smoke. The damp night breeze. The sound of cars driving in the distance. For the end of summer, that was all they needed. The last sparkler burned out. Leaving behind the scent of gunpowder, the surroundings returned to the colors of the night. Nobody knew. That this would be the last night the three of them would spend together. And that the sight of those small fireworks would become a memory that the two of them could never forget. September 1st. Summer vacation ended, and the two headed to school as usual. It was a morning no different from any other. The rising sun, the path to the station, the familiar school building. However, from the moment they entered the classroom, something was wrong. A buzz of whispers. A heavy atmosphere. An unnatural silence, as if everyone knew something but hesitated to put it into words. And there, for the first time, the two learned the truth. That Ryoma had passed away last night. It was too sudden, too surreal. Last night, he was certainly right there beside them. He was laughing. He was holding a firework. Wrapped in smoke, they had spent time together just like always. And yet. After crossing just a single night, that person was no longer anywhere in this world. Only the memories of the two were left behind in yesterday. The sky visible from the classroom window was the same blue as yesterday. That felt terribly cruel. On the way home that day, the two thought back to yesterday over and over again. The riverbank. The night breeze. The smell of smoke. And the last sight of Ryoma. Why? If only they could go back to yesterday. If only they could do it over just one more time. That wish sank deep into their chests, stronger than sadness, deeper than regret. They wanted to go back. To that day. To August 31st. Just one more time. They wanted to redo that night. They wished for it with all their might. When they woke up the next morning, the familiar summer sky was outside the window. The date displayed on the smartphone... —August 31st. The summer that was supposed to have ended had begun once again.