The official website for the upcoming anime film adaptation of Kaori Mado and Akamoku’s light novel “Kimi to Hanabi to Yakusoku to” (You, Fireworks, and Our Promise) has revealed a wave of new information, including additional cast and staff members, the theme song, a striking key visual, and the first official trailer. The highly anticipated romantic drama is now confirmed to premiere in Japanese theaters on July 17, setting the stage for one of the summer’s most talked-about anime releases.
New Cast Members Join the Summer Romance
Two prominent voice actresses have been added to the film’s roster, bringing key supporting characters to life. Rie Takahashi, widely recognized for her roles in series such as “Kanojo, Okarishimasu” and “Re:Zero – Starting Life in Another World,” will voice the character Haru. Joining her is Natsuko Yokosawa, known for her work in “Bokura no Yoake,” who takes on the role of Yukari Natsume. These additions round out a cast that promises to deliver the emotional depth and nuanced performances essential for a story centered on love, memory, and the fleeting beauty of fireworks.
Production Team Brings Top-Tier Talent Behind the Camera
The film is being directed by Akira Suzuki, whose previous work includes “Kami no Tou: Ouji no Kikan” (Tower of God: Return of the Prince). The animation production is a collaborative effort between SynergySP and The Answer Studio, a partnership that blends experience and creative ambition. Kouhei Mori is handling the screenplay, ensuring the narrative structure stays true to the source material’s emotional core. Yuuji Watanabe, who served as animation director on “Fairy Tail Movie 2: Dragon Cry,” is designing the characters, bringing a polished and expressive visual style to the adaptation.
The technical and artistic departments are equally stacked with seasoned professionals. Toshiharu Mizutani, known for his art direction on “Banana Fish,” takes on the role of art director, setting the visual tone for the film’s intimate and atmospheric settings. Shiho Kuriki, whose credits include the recent “Anne Shirley” adaptation, oversees color design, while Shinji Saitou, director of photography for “City Hunter Movie: Tenshi no Namida,” handles cinematography. Sound direction is in the capable hands of Takeshi Takadera, whose portfolio includes the critically acclaimed “[Oshi no Ko].” The musical score is composed by Alisa Okehazama, best known for her work on “Kusuriya no Hitorigoto” (The Apothecary Diaries), ensuring that the film’s emotional beats are underscored by a compelling and evocative soundtrack.
Theme Song Previewed in First Trailer
J-pop group timelesz, who previously performed the opening theme for “Hananoi-kun to Koi no Yamai,” will contribute the film’s theme song titled “Kienai Hanabi” (Unfading Fireworks). The track is previewed in the newly released first main trailer, offering audiences an early taste of the film’s musical direction and emotional register. The song’s title is a direct nod to the film’s central motif—fireworks as a symbol of transient yet unforgettable moments.
A Look at the Source Material and Manga Adaptation
The film adapts the romantic light novel written by Kaori Mado and illustrated by Akamoku, which was originally published under Shogakukan’s Gagaga bunko imprint in December 2025. The story has already resonated with readers for its heartfelt exploration of relationships and the weight of promises made against the backdrop of summer fireworks. Building on that momentum, a manga adaptation drawn by Yomiya Ririura began serialization on Shogakukan’s Sunday Webry web service on March 26, expanding the story’s reach to a wider audience ahead of the film’s release.
First Trailer and Viewing Options
The first official trailer provides a glimpse into the film’s visual style, character dynamics, and the central relationship that drives the narrative. It is important to note that the embedded YouTube video is region-locked for certain territories. An alternative link is available for viewers who encounter access restrictions, ensuring that international fans can still experience the debut footage.
With a premiere date set for July 17, a talented creative team in place, and a growing fan base eagerly awaiting its arrival, “Kimi to Hanabi to Yakusoku to” is shaping up to be a standout theatrical release this summer. As the marketing campaign continues to unfold, more details about the film’s runtime, additional cast members, and potential international distribution are expected to emerge in the coming weeks.
