今回ATEEZとコラボしているBE:FIRSTはJ-POPグループです これを機にBE:FIRSTの曲も聴いてみてください。 Mainstream BOOM BOOM BACK Masterplan 彼らはライブパフォーマンスも魅力です。 これからもよろしくお願いします。

BE:FIRST is a Japanese hip-hop boy group with 7 members and they’re amazing especially when it comes to dance 🔥 About their ages, really close to Ateez members, only the maknae Ryuhei (blue hair guy) pretty young JUNON & LEO 1998 RYOKI 1999 SOTA & MANATO 2001 SHUNTO 2003 RYUHEI 2006 Would be so happy if you could check out some of their songs. Mainstream, Gifted and their latest release Masterplan along with dance practices.

Thank you for reaction to BE:FIRST&ATEEZ. BE:FIRST has only been 3 years since their debut, but they are very active Japanese group. Please respond to Mainstream and Boom Boom Back.

This is Atiny. Of course the song is great, but the MV is Sulreall! ! There are so many people, and yet each one with their talents, in fact, the charm of each person is exploding, optimal voices of the be: First! In addition, those who called the two groups to this MV deserves a triple increase, is as if they had left a fashion show! Many thanks to be: first and sky-hi for this wonderful collaboration. I have always been sure that dance and music can easily cross borders. Aleez, literally broke the glass barrier to join Be: First. My God, what an amazing video, what a sick bit, and that wonderful voices meet next to Ateez. I'm Atony, and now Bestiny. So proud of all of you, I'm reaching and now better. Thanks for this collab, iconos. ATEEZ/BE: FIRST. Thank you for your great reaction..👑❤👏👏

From comments , BeFirst - relatively new group, 3 years old .

I love that the song is trilingual- these two groups are well matched, and the song is a banger. Hell yes!

Reactionありがとうございます！！素晴らしいCollaborationですね✨ぜひBE:FIRSTもチェックしてもらえるとうれしいです。おすすめはMainstreamですfrom Japan🇯🇵

リアクションありがとうございました。 befirst🇯🇵ファンです。 mainstream リアクションお願いします

Thank you for reaction, from JAPAN🇯🇵 I also recommend BE:FIRST "Mainstream"MV☺️

Thanks for the response ♡. Both are very nice! Keep an eye out for BE:FIRST! And listen to the other songs ♡. I guarantee you will enjoy them!😊😊

Thank you so much for your reaction!!

I can hear "Empty Box" a thousand times, that a thousand times I cry. Our ATEEZ, what a music, what a rap. OMG.😭😭❤👏👏👏👏👏👏👏😪

ありがとうfor the reaction❕❤️‍🔥

ありがとうございます💙❤

Hello🎉 thank you🎉 reaction🎉 Japan

リアクションありがとうございます！BEFIRSTはジャンルレスでダンス歌唱ともにレベルの高い、グループです。、せひ他の楽曲も楽しんでみてください!

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Loved this collab the song and mv is epic as well As for empty box it is definitely live as just released the log book for it today and hongjoongs rap got backing as he has ablibs on his part same for mingi