あらすじ
SynergySP制作の映画。2026年夏、全1話、完結。
The story centers on two Tokyo high schoolers who connect over a painting of fireworks. They trace the painting to the Nagaoka Fireworks Festival in Niigata, one of Japan's three major fireworks festivals, and to a mysterious promise that connects the two to the past.
あらすじはAniListより（英語）。
