Kimi to Hanabi to Yakusoku to Film Adds Cast, Staff, Theme Song, Trailer
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.