You, Fireworks, and Our Promise Film's Theme Song Mashup Video Released
The video is the final promotional push before the July 17 opening, tying the film's fictional romance to a real fireworks festival and an idol group's theme song.
Reporting from 1 source: Anime News Network.
The staff for the anime film You, Fireworks, and Our Promise released a theme song mashup video on Thursday. The video features timelesz's 'Kienai Hanabi' and intercuts footage of the main characters with real-life footage of the Nagaoka Festival Grand Fireworks Show. The film opens July 17.
The film adapts Kaori Mado's novel, published in December 2025 under Shogakukan's Gagaga Bunko imprint. The story is a coming-of-age romance set against the real Nagaoka Festival Grand Fireworks Show, which draws hundreds of thousands of visitors to Niigata Prefecture each year. The lead voice actors include Shōri Satō of timelesz as Makoto and Nanoka Hara as Aki, with Rie Takahashi as the mysterious girl Haru. The film was previewed at the Cannes International Film Festival in May as part of a Tokyo International Film Festival event.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.