Taking place after the events of the Kamen Rider Gotchard TV series, the time is approaching for each of them to leave for their individual tomorrows. After graduating from high school, Houtaro Ichinose's dream remains the same: to become a big-time alchemist. Renge Icho and Sabimaru Tsuruhara are also moving on to the next stage. As for Rinne Kudo...
Seiran General Art Institute Stage Department Performance Major third years Koharu Yanagi, Suzu Minase, and Hisame Honami aim for greater heights, with Koharu as the chief and Suzu and Hisame as the sub-chiefs. The strict teacher Kyoko Yakumo tells them, "This year's new students won't be easy to deal with." Five students among the first years stand out as soon as school begins: Ruri Shimotsuki and Oto Namioka from the Stage Department Performance Major, and Nanaha Akemitsu, Kei Shidara, and Nagomi Koromoya from the General Studies Department. Many students were roused after seeing them break school regulations and put on a performance in their own style without permission, and the school is abuzz from the event. Koharu and the others are hit with an unexpected shock seeing the girls behave in a way that flatly rejects Seiran General Art Institute's "ideology". In order to find "their reason for being here" and "their true selves", they clash over differing values.
The extended version of the Romeo & Juliet play performance as seen in Kamen Rider Gotchard's 31st episode, and presented like it was shot in-universe.
Released to commemorate Kamen Rider 555's 20th anniversary, the film takes place after the ending of the TV series. Masato Kusaka and Mari Sonoda are fighting a new iteration of Smart Brain led by Kitazaki, who begins an operation to exterminate all Orphnochs, with Takumi Inui seemingly working with them for unknown reasons since his disappearance.
Seisho Music Academy, Siegfeld Institute of Music, and Seiran General Art Institute are to put on a play as part of an exchange program between the three schools. With Yachiyo supervising Siegfeld, she and the five middle schoolers meet with Claudine, Futaba, and Suzu. The play they will be performing is Seisho's popular program "The Wartime of Farewells". As it had been previously revived with Kaoruko and Maya in the lead roles, Claudine and Futaba participate with an extraordinary resolve; meanwhile, Suzu gains a keen interest in Siegfeld's newborn raw gems. Following Regalia, each of them has taken a step forward as a Stage Girl, but Shiro alone remains without a reason to stand on stage. Shiro has been a servant of the Siegfeld family since childhood, and has lived her life solely for Stella's sake, giving everything up for her. However, her reason of being is shaken up once a camaraderie between Stella and Ryoko starts to develop after their revue.
Siegfeld Institute of Music Junior High. An educational institution established for the purpose of training Rohedelstein, the future candidates for the roles of Edels. Two transfer students from Germany are due to enrol in the Junior High. One is Stella Takachiho, whose heritage is descended from Siegfeld's own prestigious family. The other is Shiro Ogami, Stella's exclusive maid. With the pair's transfer comes a drastic change in the fates of fellow Junior High students Ryoko Kobato, Minku Umibe, and Kuina Moriyasu. Liu Mei Fan works hard to meet the expectations of Akira Yukishiro and Michiru Otori, who are searching for a stage girl to carry Siegfeld on their backs. The ones who must entrust it, and the ones who must be entrusted with it—the symbol of the noble king, "Regalia", will end up...
The play tells a new original story that features characters from the Shōjo☆Kageki Revue Starlight Re LIVE mobile game, featuring and primarily focused on the Edels and Junior High students of Siegfeld Institute of Music. It also features all three Seiran General Art Institute students, as well as Claudine Saijo from Seisho Music Academy, Fumi Yumeoji from Rinmeikan Girls School, and Shizuha Kocho from Frontier School of Arts.