The Ultra Peace Busters creative team — consisting of director Tatsuyuki Nagai, writer and director Mari Okada, and artist Masayoshi Tanaka — announced their new original anime film project, titled Sora no Aosa o Shiru Hito yo (To Those Who Know of the Blueness of the Sky), on Thursday. The anime will screen in all TOHO CINEMAS in Japan starting on October 11. Nagai is directing, Okada is penning the script, and Tanaka is drawing the original character designs and serving as chief animation director. CloverWorks is in charge of animation production. Producers Hiroyuki Shimizu (anohana, The Anthem of the Heart) and Genki Kawamura (your name., Mirai) are producing the film.
The text in the visual above reads, "This is the story of a heartrending and mysterious second first love."
Nagai, Okada, and Tanaka commented that the film is the third work set in Okada's hometown of Chichibu, after anohana and The Anthem of the Heart. Nagai also noted that the film will center around the relationship between four people.
The trio first collaborated on the Toradora! anime in 2008, and reunited for the anohana original anime and films in 2011 and 2013. The group's Ultra Peace Busters moniker originated from anohana. The trio then collaborated once more in 2015 with The Anthem of the Heart original anime film. Nagai and Okada collaborated again (without Tanaka) on the Mobile Suit Gundam: Iron-Blooded Orphans series, and Nagai served as unit director for Okada's directorial debut film Maquia – When the Promised Flower Blooms in 2018.
Okada's other works include her frequent collaborations with P.A. Works, including True Tears, Hana-Saku Iroha, A Lull in the Sea, and The Lost Village. P.A. Works also produced her Maquia film. Okada's O Maidens in Your Savage Season manga is inspiring a television anime that will premiere in July.
Tanaka's other notable works where he served as character designer and chief animation director include your name., DARLING in the FRANXX, Highschool of the Dead, Joshiraku, and Waiting in the Summer.