The official website for the Bocchi the Rock! anime series has announced a new prequel film, Bocchi the Rock! Hoshi no Ashiato, slated for a 2027 release in Japanese theaters. According to the report, the story centers on the relationship between Seika Ijichi and her younger sister, Nijika, beginning with their separation a decade ago. The film features Maaya Uchida as Seika Ijichi and Sayumi Suzushiro as Nijika Ijichi. Studio CloverWorks is returning to produce the project, with Shin Wakabayashi directing and Erika Yoshida handling the script. The production staff also includes character designer Yukiko Horiguchi and sound director Akiko Fujita. This film follows the franchise's 2022 television anime adaptation and the two-part compilation movie project released in 2024. The original manga by Aki Hamaji, which began serialization in 2017, continues to be published by Houbunsha, with English-language releases handled by Yen Press.