[Acapella] The "Wall" busts out beatbox & backing shouts to turn a glitch into a stunning acapella finish | SoraRio

The karaoke app's BGM suddenly cut out. While Sora and Riona continued singing acapella, off-screen Iroha (the "wall") joined in with beatbox and backing shouts, leading the trio to complete the song through pure vocal performance.

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