{"site":"Yomimono","license":"CC BY 4.0 (citation required)","generated_at":"2026-05-22T23:00:09.797Z","story":{"id":"r_7559dfbd9af0424fa19a3ee2","slug":"timelesz-performs-theme-song-for-shori-sato-starring-film-you-fireworks-and-a","url":"https://yomimono.id/timelesz-performs-theme-song-for-shori-sato-starring-film-you-fireworks-and-a","headline":"Timelesz Theme Song and New Cast Revealed for Shori Sato Anime Film","summary":"The upcoming anime film \"You, Fireworks, and a Promise\" has revealed its theme song and two new cast members. The idol group timelesz will perform the song \"Kienai Hanabi\" for the film, which stars group member Shori Sato in his first lead anime film role. Voice actress Rie Takahashi joins the cast as Haru, a mysterious girl who appears before the protagonist, and comedian Natsuko Yokozawa, a Niigata native, voices Makoto's mother Yukari. The film is based on the novel by Madoroka and is set against the Nagaoka Festival Grand Fireworks Display in Niigata, one of Japan's three major fireworks festivals. The story follows high school student Makoto Natsume, voiced by Sato, who is approached by classmate Aki Hayama, voiced by Nanoka Hara. Aki tells Makoto that her great-grandmother said she would one day meet him, and the two are drawn into a mystery involving a picture of a firework and a promise made across 81 years. The main trailer featuring the theme song has been released. The film opens nationwide on July 17, 2026. Director Kei Suzuki, known for \"Tower of God: Workshop Battle,\" helms the project, with animation production by SynergySP and Answer Studio.","why_it_matters":"The casting of Rie Takahashi and Natsuko Yokozawa, combined with the theme song performed by the lead actor's own group, gives the film a built-in audience draw from both anime voice acting fans and idol followers.","published_at":"2026-05-19T00:15:50.000Z","source_count":3,"sources":["Eiga Natalie","Comic Natalie","Anime Anime"],"citations":[{"source":"Eiga Natalie","title":"Timelesz to perform theme song for Shori Sato-starring film \"You, Fireworks, and a Promise\"; Rie Takahashi and Natsuko Yokozawa join cast (with trailer and comments)","url":"https://natalie.mu/eiga/news/672499"},{"source":"Comic Natalie","title":"\"You, Fireworks, and a Promise\" main trailer released, theme song by timelesz, Rie Takahashi and Natsuko Yokozawa appear (with video / with comments)","url":"https://natalie.mu/comic/news/672495"},{"source":"Anime Anime","title":"timelesz Satō Shōri's Starring Anime Film 'Kimi to Hanabi to Yakusoku to' Theme Song to Be Group's New Song 'Kienai Hanabi' [With Comments]","url":"https://animeanime.jp/article/2026/05/19/99070.html"}],"license_url":"https://creativecommons.org/licenses/by/4.0/","entities":{"anime_titles":["君と花火と約束と"],"manga_titles":[],"studios":[],"people":["佐藤勝利","原菜乃華","高橋李依","横澤夏子"],"type":"announcement","domain":"anime","is_roundup":false}}}