BE:FIRST / Mainstream -Music Video- REACTION!!

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BE:FIRST / Mainstream -Music Video- Reaction... THEY ARE SO CREATIVE!!

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Dope Reaction!! BE:FIRST / Mainstream -Music Video-

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【衝撃作】これはとんでもない事になりました。凄すぎる…世界規模の楽曲、BE:FIRSTが最高の作品を公開しました。『Mainstream』ミュージック・ビデオREACTION‼️

BE:FIRST / Metamorphose -Dance Practice- (REACTION!!)

FIRST TIME EVER REACTION TO BE:FIRST (ビーファースト) - Mainstream M/V & Dance Performance |🧊 OOOOOOOOH!

Rapper Reacts to BE:FIRST - Mainstream Music Video | First Time Reaction!

FIRE!! 🔥 BE:FIRST Mainstream MV + Dance Performance REACTION

【BESTYさん一緒に観よ？】 BE:FIRST 「Mainstream」 Dance Practice プロダンサーと観るリアクション動画【reaction】

BE:FIRST "Mainstream" | Mireia Estefano Reaction Video

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Reaction Video: BE:FIRST / Mainstream -Music Video-[REQUESTED]

BE:FIRST - Mainstream MV | REACTION

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BE:FIRST 💥 Mainstream MV: Did They Conquer J-Pop? 🤯 My Reaction 🔥 「日本語」