TL;DR, The first trailer for the Kimi to Hanabi to Yakusoku to anime movie arrived, showing new footage and a key visual, and confirming Rie Takahashi and Natsuko Yokosawa in the cast, the theme song by timelesz, and a July 17 Japanese theatrical premiere.

The official website unveiled a first trailer and July 17 premiere. The video arrives with a new key visual and confirms fresh casting, core staff, and the theme song Kienai Hanabi by timelesz.
The Kimi to Hanabi to Yakusoku to anime movie, adapted from Kaori Mado and Akamoku’s novel You, Fireworks, and Our Promise, is directed by Akira Suzuki with production by SynergySP and The Answer Studio.

What the new Kimi to Hanabi to Yakusoku to trailer reveals

Premiering on the film’s official site, the first trailer packages the project’s debut footage with a new key visual. The announcement confirms the adaptation of Kaori Mado and Akamoku’s light novel, while spotlighting the core creative team, studios, and on-screen credit slates that set the tone for a romance drama.

Production details take center stage. Cards in the Kimi to Hanabi to trailer highlight director Akira Suzuki, studios SynergySP and The Answer Studio, and character designer Yuuji Watanabe. The video also previews the theme song, Kienai Hanabi, performed by timelesz.

The site notes the upload is region-locked, and provides an alternative link for some viewers.

• First trailer reveals the adaptation title and confirms it as a feature-length project.
• New key visual accompanies the drop, pairing with the video on the official page.
• On-screen credits list Akira Suzuki as director and spotlight SynergySP and The Answer Studio.
• Character design is credited to Yuuji Watanabe, aligning with the featured artwork.
• Music is by Alisa Okehazama, with a trailer preview of timelesz’s Kienai Hanabi.
• Technical roles highlighted include art direction, color design, photography, and sound direction.
• Cast cards confirm Rie Takahashi as Haru and Natsuko Yokosawa as Yukari Natsume.
• The closing slate displays the Japanese theatrical date of July 17.
• Official site flags the clip as region-locked and points to an alternate viewing link.

While the cut emphasizes credits and release messaging, it frames a grounded, contemporary coming-of-age premise built around promises and fireworks. The trailer’s structure mirrors many romance features, moving from identity cards to music cue and date card, which cleanly maps out what audiences need to know right now.

Release date and where to watch Kimi to Hanabi to Yakusoku to

The film opens in Japanese theatres on July 17, as stated on the official website. That card appears at the end of the first video, locking the Kimi to Hanabi to Yakusoku to release date for a midsummer bow aligned with its fireworks motif.

The announcement covers the Japanese theatrical release only. No streaming platform, overseas distributor, subtitled screenings, or international rollout details were provided. Any ticketing information, bonus items, and theater lists are not yet confirmed, so check the official site for schedule updates as opening day approaches.

• July 17 premiere: Theatrical release in Japan confirmed via the trailer’s end card.
• Japanese theatres: Launch format is cinema-only at the time of announcement.
• International status: Overseas theatrical dates have not been announced.
• Streaming/VOD: Platforms and windows are currently unannounced.
• Language formats: Subbed or dubbed screenings outside Japan are not yet detailed.
• Ticketing and venues: Theater listings and advance-sale plans are pending.
• Marketing assets: A key visual and the first trailer support the opening push.
• Access note: The posted video is region-locked, with an alternate link provided.
• Source attribution: All release information comes from the official website and announcement.
• Franchise label: Marketed as the You, Fireworks and Our Promise anime feature.

The project adapts the romantic novel published under Shogakukan’s Gagaga Bunko imprint, which often feeds directly into summer theatrical slates. The practical read is simple. Expect a Japan-first run, with later updates on any broader theatrical release or home formats once the domestic opening has passed.

Cast, staff and the theme song for Kimi to Hanabi to Yakusoku to

Two voice stars join the Kimi to Hanabi to Yakusoku to cast. Rie Takahashi voices Haru, and Natsuko Yokosawa plays Yukari Natsume. The theme song is Kienai Hanabi by J-group timelesz, previewed in the first trailer, following the group’s work on the Hananoi-kun to Koi no Yamai opening.

• Director: Akira Suzuki (credited on Kami no Tou: Ouji no Kikan) leads the film.
• Studios: Produced by SynergySP and The Answer Studio.
• Script: Kouhei Mori handles screenplay duties.
• Character Design: Yuuji Watanabe (animation director on Fairy Tail Movie 2: Dragon Cry).
• Art Director: Toshiharu Mizutani (worked on Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka).
• Color Design: Shiho Kuriki (Anne Shirley).
• Director of Photography: Shinji Saitou (City Hunter Movie: Tenshi no Namida).
• Sound Director: Takeshi Takadera ([Oshi no Ko]).
• Music: Alisa Okehazama (Kusuriya no Hitorigoto).
• Theme Song: timelesz performs Kienai Hanabi, previewed in the trailer.
• Novel Authors: Kaori Mado and illustrator Akamoku source the story.
• Imprint: Originates from Shogakukan’s Gagaga Bunko label.

According to the official site, this The Answer Studio anime movie is co-produced with SynergySP under Suzuki’s direction, with Mori’s script and Watanabe’s designs defining the on-screen look. The credits round out with Okehazama’s score and Takadera’s sound direction, while timelesz’s Kienai Hanabi anchors the film’s musical identity.

The first trailer flags Takahashi and Yokosawa prominently, aligning the lead duo with the story’s promise-driven premise. With the core staff and theme set, the feature moves into its July window with its creative blueprint public, from studio pairing to the recorded music heard in the debut cut.

Source: MAL