The anime film *Kimi to Hanabi to Yakusoku to* is set for a nationwide release on July 17, 2026, with its cast, staff, and theme song fully announced.
The anime film adaptation of the light novel *Kimi to Hanabi to Yakusoku to* is scheduled for a July 17, 2026 release in Japanese theaters. The film is based on the novel by Matoka, published under Shogakukan's Gagaga Bunko imprint in December 2025. The story is a love drama set against the Nagaoka Festival Grand Fireworks Display in Niigata. It follows protagonist Makoto Natsume, who is approached by classmate Aki Hayama. She says her great-grandmother told her he would draw a picture for her, and she possesses a mysterious fireworks artwork.
The film is directed by Akira Suzuki at SynergySP and The Answer Studio, with planning and production by Shin-Ei Animation. The script is by Kohei Mori, and character designs are by Yuuji Watanabe. The idol group timelesz performs the theme song "Kienai Hanabi." Shori Sato of timelesz voices the protagonist Makoto Natsume. Rie Takahashi voices Haru, and Natsuko Yokosawa voices Yukari Natsume, Makoto's mother.
Three members of the idol group AVAM-Nanami Saeki, Hana Kikyo, and Yuka Himemiya-were later cast as classmates of Makoto. Saeki said voicing a theatrical anime was a goal of hers. Kikyo noted she lived in Niigata as a child and watched the Nagaoka fireworks annually. Himemiya expressed hope the film becomes everyone's "unforgettable summer." The casting of AVAM, a group with over 2.2 million social media followers, expands the film's cross-promotional reach alongside timelesz.
Synthesized by Yomimono from the cited Yomimono stories below, each itself
sourced, then editorially reviewed. Every
fact links the story it came from.
Jun 2
Three members of the idol group AVAM-Nanami Saeki, Hana Kikyo, and Yuka Himemiya-have been cast in the anime film "Kimi to Hanabi to Yakusoku to." They will voice classmates of the protagonist Makoto Natsume, played by Shori Sato of timelesz. The film is based on the novel by Matoka, published under Shogakukan's Gagaga Bunko. Directed by Kei Suzuki, the animation is produced by SynergySP and Answer Studio, with planning and production by Shin-Ei Animation. The story is a love drama set against the Nagaoka Festival Grand Fireworks Display in Niigata. It follows Makoto, who is approached by classmate Aki Hayama, who says her great-grandmother told her he would draw a picture for her. The film is scheduled for nationwide release on July 17, 2026. Saeki commented that voicing a theatrical anime was a goal of hers. Kikyo noted she lived in Niigata as a child and would watch the Nagaoka fireworks annually. Himemiya expressed hope the film becomes everyone's "unforgettable summer."
May 19
The official website for the anime film adaptation of Kaori Mado and Akamoku's light novel *Kimi to Hanabi to Yakusoku to* revealed additional cast, staff, the theme song, a key visual, and the first trailer on Tuesday. The film is scheduled to premiere in Japanese theaters on July 17. Rie Takahashi joins the cast as Haru, and Natsuko Yokosawa voices Yukari Natsume, the mother of protagonist Makoto Natsume. The idol group timelesz performs the theme song "Kienai Hanabi," which is previewed in the new trailer. Akira Suzuki directs the film at SynergySP and The Answer Studio, with a script by Kohei Mori and character designs by Yuuji Watanabe. The light novel was published in December 2025 under Shogakukan's Gagaga Bunko imprint. The story follows Makoto, who becomes involved with classmate Aki Hayama, who possesses a mysterious fireworks artwork and was told by her great-grandmother that she would meet someone named Makoto Natsume.