"You, Fireworks, and Our Promise" Anime Film Unveils New Cast Members, Deepens Anticipation for July 17th Premiere

Tokyo, Japan – June 2, 2026 – The highly anticipated anime film adaptation of Kaori Mado’s beloved novel series, You, Fireworks, and Our Promise (known in Japanese as Kimi to Hanabi to Yakusoku to, or Kimi-Hana for short), has generated fresh excitement with the announcement of three new cast members. The additions, revealed today by the film’s production team, further flesh out the supporting cast of high school classmates surrounding the story’s central protagonists, Makoto Natsume and Aki Hayama.

The newly revealed voice talents are members of the popular idol group AVAM: Nanami Saiki, Hanaka Kikyō, and Yuka Himemiya. Each will lend their voices to characters who are classmates of the socially awkward yet earnest protagonist, Makoto. Alongside the cast announcement, the production team also released new stills from the film, offering a glimpse of these characters and the actors bringing them to life. This latest update comes as the film gears up for its theatrical release on July 17th, a date circled on the calendars of many fans eager to experience this poignant coming-of-age romance on the big screen.

The film promises a visually stunning and emotionally resonant narrative, set against the backdrop of the Nagaoka Festival Grand Fireworks Show. This iconic event, one of Japan’s three largest fireworks displays, draws hundreds of thousands of spectators to Niigata Prefecture annually. It is within this spectacular setting that the story of Makoto, a Tokyo high school boy grappling with a lack of social skills and self-confidence, and Aki, a popular, talented, and seemingly flawless class president, unfolds. Their connection is forged through a mysterious drawing of a fireworks display, setting them on a path where they must confront fate and make critical choices within a limited timeframe.

The established lead cast includes Shōri Satō of the idol group timelesz as Makoto Natsume, and actress Nanoka Hara, known for her roles in Suzume, the live-action Oshi no Ko, and Mieruko-chan, as the heroine Aki Hayama. Rie Takahashi is also on board to voice the enigmatic "mysterious girl" Haru, adding another layer of intrigue to the narrative. Natsuko Yokosawa will portray Makoto’s mother, Yukari Natsume.

A Glimpse into the Production and Creative Team

The artistic and directorial vision for You, Fireworks, and Our Promise is helmed by Kei Suzuki, whose previous work includes assistant director duties on City Hunter The Movie: Angel Dust and his involvement with Tower of God: Return of the Prince. Suzuki is directing the film at the renowned studios Synergy SP and The Answer Studio. The screenplay has been crafted by Kōhei Mori, promising a narrative that captures the delicate nuances of adolescent relationships and self-discovery.

Character design is a crucial element for any anime, and for Kimi-Hana, this responsibility falls to Yōji Watanabe, who has contributed his talents as a guest character designer and animation director on various projects. The project’s planning and production have been spearheaded by Michihiko Umezawa, known for his work on The Dangers in My Heart and A Couple of Cuckoos, in collaboration with Shinei Animation. Adding a musical flair to the film, the theme song "Kienai Hanabi" (Eternal Fireworks) is performed by the idol group timelesz, further intertwining the film’s narrative with the world of popular music.

Building Momentum: A Pre-Release Journey

The excitement surrounding You, Fireworks, and Our Promise is not solely confined to its upcoming theatrical release. The film has already garnered international attention, having been showcased at the 79th Cannes International Film Festival on May 15th. This prestigious screening was part of the "Tokyo International Film Festival’s Goes to Cannes" event, highlighting the film’s potential for global appeal and its artistic merit.

Further expanding its reach, the novel series is also receiving a manga adaptation, indicating a growing multimedia presence for the story. The original novel, illustrated by Akamoku (known for The Girl Who Wants to Be a Hero and the Girl Who Ought to Be a Hero), was published by Shogakukan’s Gagaga Bunko imprint on December 18, 2025. This multi-pronged approach to storytelling ensures that Kimi-Hana will be accessible to a wide audience across different media platforms.

Thematic Resonance and Narrative Depth

At its core, You, Fireworks, and Our Promise is a story of burgeoning romance and the profound journey of self-acceptance. The Nagaoka Festival serves as more than just a picturesque backdrop; it is a crucible where the protagonists are forced to confront their insecurities and embrace the possibilities of connection. Makoto’s internal struggles with social anxiety and self-doubt are juxtaposed with Aki’s outward perfection, creating a dynamic that promises relatable and compelling character development. The mysterious drawing acts as a narrative catalyst, a symbol of fate and destiny that compels the two seemingly disparate individuals to interact and potentially find solace and strength in each other.

The inclusion of AVAM members Nanami Saiki, Hanaka Kikyō, and Yuka Himemiya as classmates of Makoto adds another layer of vibrancy to the film’s ensemble. Their roles, though supporting, are crucial in depicting the social landscape of high school and the everyday interactions that shape the protagonists’ lives. The release of stills featuring these characters suggests a thoughtful integration of their performances, aiming to capture the authentic feel of adolescent friendships and rivalries.

Looking Ahead: The Impact of "Kimi-Hana"

The July 17th release date is fast approaching, and with it, the opportunity for audiences to immerse themselves in the world of Kimi-Hana. The film’s early preview at Cannes underscores its artistic ambition and the confidence of its creators. The synergy between the novel, the upcoming manga adaptation, and now the animated film, suggests a strategic effort to build a robust franchise around Kaori Mado’s narrative.

The success of You, Fireworks, and Our Promise could pave the way for further adaptations and a deeper exploration of its themes within the broader anime and manga landscape. Its focus on relatable emotional struggles, set against a visually captivating cultural event, positions it as a potential standout in the summer release slate. Fans and critics alike will be watching closely to see how this poignant tale of young love, self-discovery, and the ephemeral beauty of fireworks unfolds on screen. The addition of new cast members and the continued release of promotional materials only serve to heighten the anticipation for what promises to be a memorable cinematic experience.