A journey through virtual worlds, where teens turn emotion into song
In the heart of Shibuya, five teen music groups journey into mysterious worlds called “SEKAI,” where their emotions take shape through song, alongside virtual singers like Hatsune Miku. But when a strange new Miku appears, unable to sing and trapped in a desolate void, the balance between worlds begins to falter. As her silence spreads, threatening every SEKAI, the teens must unite across realities to help her find her voice and remind her, and themselves, why they began singing in the first place.