In the animated musical drama film "Gekijô-ban Purojekuto Sekai Kowareta Sekai to Utaenai Miku," Ichika, a high school musician, enters the mysterious virtual dimension "SEKAI" where she and her friends express their innermost emotions through music alongside Hatsune Miku. A new Miku appears, struggling to connect with her listeners, and Ichika and her friends help her refine her song and gain confidence. As they work together, they realize that their own connections to Hatsune Miku's Sekai are connected to the real world, and that the only way to save the lonely Miku is to lift the depression and hope of those whose feelings formed her Sekai. In the end, Miku reappears and performs a song that successfully connects with the populace, restoring her Sekai and the other bands' Mikus to existence.