BACKBONE (Original) [feat. NAIKA MC, MC CARDZ, 呂布カルマ & RITTO]
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BACKBONE (Instrumental) [feat. NAIKA MC, MC CARDZ, 呂布カルマ & RITTO]
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BACKBONE (Acapella) [feat. NAIKA MC, MC CARDZ, 呂布カルマ & RITTO]
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