BE:FIRST / Mainstream -Music Video- REACTION

【史上最高】BE:FIRST / Mainstream -Music Video- 衝撃すぎた超初見リアクション！！

BE:FIRST / Mainstream -Music Video- & -Dance Performance-|REACTION

THEY'RE BACK!!! | BE:FIRST / Mainstream -Music Video- | REACTION

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

|K-POP REACTION| Реакция на ATEEZ(에이티즈)- 'Ice On My Teeth' Official MV

BE:FIRST Mainstream MV Reaction (JP Sub)

ZorDon Reacts to "BE:FIRST / Mainstream -Music Video-" | Fandom Fridays

BE:FIRST - Mainstream (MV) | Reaction

BE:FIRST / Mainstream -Music Video- REACTION

BE:FIRST / Mainstream -Music Video // Reaction

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

一発KOの放心状態。すごいの来たわ…。 BE:FIRST ’Mainstream’ -Music Video-【歌声分析】【リアクション】

BE:FIRST / Mainstream -Music Video- | REACTION

BE:FIRST "Mainstream" | Mireia Estefano Reaction Video

BE:FIRST / Mainstream -Music Video- | Reaction リアクション @BEFIRSTOfficial【BE:FIRSTリアクション動画】

[ENG SUB] BE:FIRST / Mainstream -Music Video- REACTION | JPOP TEPKİ

ATEEZ - 'Ice On My Teeth' MV REACT

【衝撃】ウソだろ？！これは完全に伝説だ！！！！ ボイストレーナーが「BE:FIRST / Mainstream」を観た反応【歌声分析】Reaction

BE:FIRST - "Mainstream" | REACTION - FIRST TIME Hearing!

驚愕の世界観にKOされました...。世界に証明した日本発の新しい時代！！BE:FIRST / Mainstream -Music Video- 解説＆リアクション！