TL;DR, The film’s full trailer and key visual were released, adding new cast members including Rie Takahashi and Nanoka Hara, new staff, and the theme song “Kienai Hanabi” by timelesz. A release date has not been announced.

Summer skies and sparks set the stage. The team behind the You, Fireworks, and Our Promise anime film released a full trailer and a new key visual that confirm new cast, new staff, and the theme song Kienai Hanabi by idol group timelesz. The cut also highlights returning leads and the film’s festival setting, signaling a gentle youth drama.

Release timing was not detailed in the materials, but the package clarifies who is involved and how the project is positioned.

What the new You, Fireworks, and Our Promise trailer reveals

The staff unveiled a full trailer and a key visual on Tuesday. The trailer confirms more faces and voices. It introduces Rie Takahashi as the mysterious girl Haru.

It also names Natsuko Yokosawa as Yukari Natsume, Makoto’s mother. With the new cast announced, the core duo stays clear. Shōri Satō of the idol group timelesz plays Makoto Natsume.

Actress Nanoka Hara plays Aki Hayama. The video also announces and previews the theme song Kienai Hanabi by timelesz. The title translates to Eternal Fireworks.

Together, these reveals set the tone for the You, Fireworks, and Our Promise anime film.

Behind the scenes, the production added key names. Toshiharu Mizutani serves as art director. Shiho Kuriki handles color design as color key artist.

Shinji Saitō leads compositing photography. Takeshi Takadera is the sound director. Arisa Okehazama composes the music.

The film is directed by Kei Suzuki at Synergy SP and The Answer Studio. Kōhei Mori wrote the screenplay. Yūji Watanabe designed the characters.

Michihiko Umezawa planned and produced the project with Shinei Animation. The theme song preview pairs with these credits to showcase the film’s mood.

The story frames a coming-of-age romance during the Nagaoka Festival Grand Fireworks Show in Niigata Prefecture. This event is one of Japan’s three major fireworks shows and draws several hundred thousand visitors every year. Makoto is a Tokyo high school boy without social skills or self-confidence.

Aki is a popular class president with beauty and talent. A drawing of a fireworks display connects them. At the mercy of the drawing’s mystery and fate, they must make a choice in a limited amount of time.

The key visual arrives with that backdrop in mind and highlights the fireworks motif. The film will open in theaters on July 17. The 79th Cannes International Film Festival previewed the film on May 15 as part of the Tokyo International Film Festival’s Goes to Cannes event.

Who joins the You, Fireworks, and Our Promise cast and staff

The new full trailer and key visual spotlight who is joining the ensemble and which creators round out the crew. It confirms more cast, unveils several department leads, and previews the theme song Kienai Hanabi (Eternal Fireworks) by the idol group timelesz. The clip leans on voices and credits, while the music cue sets a reflective tone.

For the You, Fireworks, and Our Promise anime film, this reveal serves as both a roll call and a mood setter. Credits highlighted in the video align with the information showcased alongside the visual.

• New cast featured: Rie Takahashi Haru is credited as the “mysterious girl” Haru, and Natsuko Yokosawa plays Makoto’s mother, Yukari Natsume.
• Additional staff credited: Toshiharu Mizutani as art director, Shiho Kuriki as color key artist, Shinji Saitō as compositing director of photography, Takeshi Takadera as sound director, and Arisa Okehazama as musical composer.

These updates arrive with a clear snapshot of the story. The coming-of-age romance unfolds during the Nagaoka Festival Grand Fireworks Show in Niigata, where a drawing of a fireworks display binds two very different teens. Shori Sato Makoto Natsume anchors the narrative as a Tokyo high school boy who lacks social skills and self-confidence, while Nanoka Hara Aki Hayama portrays a popular class president with beauty and talent.

At the mercy of the drawing’s mystery and of fate, the pair must make a choice in a limited amount of time. The trailer and visual underline those themes of connection, time, and spectacle, while the timelesz song threads a wistful tone through the footage.

The leads and the music sit within a broader creative lineup that the materials reiterate. Shōri Satō of timelesz voices Makoto Natsume, and actress Nanoka Hara plays Aki Hayama. Kei Suzuki directs at Synergy SP and The Answer Studio, Kōhei Mori handles the screenplay, and Yūji Watanabe provides character designs.

Michihiko Umezawa planned and produced the project with Shinei Animation. Together with the newly listed department heads like Toshiharu Mizutani and Arisa Okehazama, the trailer’s credits map out the team carrying this fireworks romance to the screen.

What the trailer and theme song hint about the You, Fireworks, and Our Promise story

The new full trailer puts story and music front and center while confirming fresh faces in the booth and behind the scenes for the You, Fireworks, and Our Promise anime film. It announces Rie Takahashi as the mysterious girl Haru and Natsuko Yokosawa as Makoto’s mother, Yukari Natsume. The video also highlights Shōri Satō of idol group timelesz as protagonist Makoto Natsume and Nanoka Hara as heroine Aki Hayama.

A theme song preview closes the reel, unveiling Kienai Hanabi (Eternal Fireworks) by timelesz, which neatly ties the soundtrack to the fireworks setting and the feelings that begin to spark between the leads.

The footage frames a coming of age romance against the Nagaoka Festival Grand Fireworks Show, one of Japan’s biggest displays that draws hundreds of thousands to Niigata Prefecture each year. Makoto, a Tokyo high school boy who lacks social skills and confidence, meets Aki, a talented and popular class president. What binds them is a drawing of a fireworks display.

At the mercy of that drawing’s mystery and of fate itself, the two must make a choice within a limited time. The trailer steers attention to this riddle and to the tension of a ticking clock, suggesting that promises made under the summer sky could reshape both teens’ paths.

On the production side, the trailer reveals more staff: Toshiharu Mizutani as art director, Shiho Kuriki as color key artist, Shinji Saitō as compositing director of photography, Takeshi Takadera as sound director, and Arisa Okehazama as musical composer. Kei Suzuki directs at Synergy SP and The Answer Studio, with a screenplay by Kōhei Mori, character designs by Yūji Watanabe, and planning and production by Michihiko Umezawa with Shinei Animation. The film will open in theaters on July 17.

It also received an early preview at the 79th Cannes International Film Festival as part of the Tokyo International Film Festival’s Goes to Cannes event on May 15, underscoring how the story’s fireworks, fate, and first love are positioned to resonate well beyond its festival backdrop.

Source: ANN