The fun thing that I've learned about this, be: first sings in Japanese and Ateez sings in Korean.

Ateez and BE:FIRST energy match so well… THAT DANCE BREAK?! I need more of this collab

BE FIRST and ATEEZ Definitely showcased their voices together and choreo together beautifully

OMG!!! I've been dying for this reaction. Also, Be:First is joining ATEEZ in LA.

Be:First is scheduled to show up at one of Ateez shows in LA

ATEEZとの素晴らしいコラボレーションのおかげで、あなた達のような新しい、楽しいリアクターの方々とも出会えて嬉しいです😊 BE:FIRSTの他の曲もぜひ聴いてくださいね❤❤

That's right. They have created a great collaboration, like a group. BE:FIRST is one of the most talented boy bands in Japan. Please check out their official channel.

This collab is one of my favorite ever....

リアクションありがとう♡ リクエストします BEFIRSTの　 『Scream』 『BoomBoomBuck』 『MainStream』 お願いします😊 『MasterPlan』

Please react to BE:FIRST ！! 「mainstream」 MV & dance practice

I’ve heard reactors say that the lyrics are about how each group are overlooked and written off but that they each continued to work hard and rose above their detractors. Kind of one big group saying “how do you like us now?” “You can’t ignore us anymore.” One reactors said that when Hongjoong stomps and breaks the glass that it symbolized them breaking the glass ceiling. All I can say is that there is nothing stopping these two groups now.

Thank you reaction ❤ Please reaction BE:FIRST Mainstream 🔥

Thank you so much💕 I'm enjoying that you guys react this video ❤ The first person to say ”BE:FIRST “is Sota.Sota’s dance is crazy. Sota has won the world dance competition four times. The collaboration between BE: FIRST and ATEEZ is amazing. This collaboration started when ATEEZ appeared at "D.U.N.K.Showcase KYOCERA DOME OSAKA" by SKY-HI,you,know,the CEO of the company :BMSG that BE:FIRST is belong . So Mingi and Hongoong performed rap collaboration songs with other groups ‘s rappers (including SKY-HI of CEO and rappers ,and BE:FIRST's Ryouki). I went to that live show, and it was so cool. It has been a long-standing dream of SKY-HI to interact like this beyond the boundaries of the group. I think it is might borders and genre barriers that ATEEZ is breaking in the video of this MV. " We don't need shields and spears. “ I guessed as if he was saying, "Just enjoy the music." K-pop and J-pop are also losing barriers, so SKY-HI used to say that if he dare to classify it, he ‘ll call it A (Asian)-pop . You can watch D.U.N.K.'s rap collaboration video on the D.U.N.K. channel.↓ “#7 (D.U.N.K.) SKY-HI Rap collaboration” You can also watch a part of ATEEZ's live performance and other groups‘s collaborations on the D.U.N.K. channel. Please react Masterplan,Mainstream of BE:FIRST,too. I got a great news yesterday. “2024 ATEEZ WORLD TOUR [TOWARDS THE LIGHT : WILL TO POWER] IN LOS ANGELES 2024.07.20&21 Los Angeles "BMO Stadium" BE:FIRST special guest appearance decision” From Japan ❤️🇯🇵

Thank you for the reaction! I'm very happy ❤ BEFIRST is good singing and dancing ✨ 🎶MainStream 🎶MilliBilli 🎶SCREAM Recommended ☺️ Action please BEFIRST ＆ ATEEZ 🫶🩵

リアクションありがとうございました。 befirst🇯🇵ファンです。 2021年結成7人ボーイズグループです。 mainstream リアクションお願いします

as a BESTY 🙋🏽‍♀️ I hope they have a tour in america one day, so I can see them live 🧎🏽‍♀️🫶🏾 it's A NEED

The guy who basically matched Jongho is named Ryoki- also a high toned rapper! He makes me think of what would happen if you squished Jongho and Hongjoong in looks and sound, which is wild. I watched a couple of Be: First’s videos and a cooking show, and his personality seemed a bit more Wooyoung. lol

Be first's voices have so much character.

honestly no Ateez collaboration has ever disappointed, they're all amazing ❤

Please you must see BE:FIRST - Mainstream MV. It's FIRE!!!

This collab was beautifully made. Well thought of, lines were equally distributed, equal screentime, choreo was sick. Perfect collab!!! It's not Be:First featuring Ateez or vice versa. It felt like one group performing.

After sky-hi and 3racha collared I didn’t think it could get better but this collab is next level. Sky-hi does it againnnnnn.

It's my favorite Collab this year It felt like one group

リアクション動画サンキュー😉👍️🎶 最高のコラボです SKY-HIが主催してるDUNKからの縁～お互いにリスペクトして今に至ります 相性が良く最高ですよね✨興奮しました✨👍🎌😘

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 B: 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. Ateez, 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.⏳🔥🔥❤👏👏👏👏👏

thank you!! とてもいいコラボ！！ そしてBE:FIRST の mainstream はぜひおすすめです！

Be:First is going to be at Ateez’s LA show. Not gonna lie, I’m jealous lol. I’m a Besty (Be:First fan) too. I would love to see my ult Ateez and Be:First. You guys should definitely check out Mainstream and Masterplan by Be:First. They were created by Sky-Hi through an audition/survival show called The First. They do not have set positions or a leader as they are all talented and step up to help when needed. I hope you react more to them. Of course my Ateez always slay. There is a reason they are my Ults.

是非BMSGのアーティストチェックしてください！その中でもダンスはもうBE FIRSTのSOTA最高です！努力と才能で世界一になった人です！

リアクションありがとうございます😊 お二人がHush Hushを楽しんでいる姿を見て 私も楽しい気持ちになりました🫶

Great reaction… loved this collab too

Been waiting for you two reaction to this best collaboration of the year.....this is soo dope

リアクションありがとうございます 2人のリアクション楽しめました ダンス好きそうなので 是非 BE:FIRSTのMainstreamやMasterplanのDance Practiceのリアクションお願いします😊

楽しいリアクションをありがとう♡最高なコラボですよね！！ from BESTY🇯🇵

I'm so mad they are gonna perform together in LA and I don't live anywhere near LA 😩 they are so good together

Hi! Thank you for reacting to BE:FIRST! First of all they don't have a leader 1:03 & 5:40 his name is Sota, he used to be a professional backup dancer and choreographer! He won many awards, including multiple world champion titles. BE:FIRST doesn't have any official position except the oldest and youngest so you can consider all of them as all rounder! ❤

めっちゃ楽しいリアクション❕❤️‍🔥🙌😆　最高ですありがとうございます🙏✨

Finally, the live video of Mainstream at BE:FIRST's Tokyo Dome performance has been released! Please react it.

If you guys want to check out more Be:first music I recommend Masterplan Boom Boom Back Mainstream Smile again You guy won’t be disappointed I actually think u guys might become a fan 🤭

Your tensions gave me a power! You guys are so fun! Please check BE:FIRST sometime soon!

リアクションありがとうございます😊🙏🇯🇵

リアクションありがとうございます😊

リアクションありがとうございます❤

ありがとうございます🤗ビーファーストの他の曲もぜひチェックよろしくお願いします💙

Collab+++💥💯💥💯❣️ Your reaction 💯💯💯

hush-hushリアクションありがとう! 去年、BE:FIRST所属のBMSG主催のD.U.N.K. FESでATEEZと共演してから仲良くなりました。こんなに早くコラボレーション見られると思ってなかったのでとても嬉しい驚きです！今回のコラボは15人が同じグループにいるかのような統一感にとても感動しました♪ Amazon primeに入会していると去年日本国内の映画館で上映されたBE:FIRST ドキュメンタリー映画と今年3月2日 3日、東京ドーム公演のライブ映像が見られます 字幕もありますのでぜひチェックしてください！ そして！そして！2024 ATEEZ WORLD TOUR [TOWARDS THE LIGHT : WILL TO POWER]IN LOS ANGELES 2024.07.20&21 Los Angeles "BMO Stadium" BE:FIRST スペシャルゲスト出演決定しました！彼ら15人がライブで観客を魅了します！

リアクションありがとう😊最後に頭振ってたのはBE:FIRSTのソウタです🎉ぜひ他のBE:FIRSTのMVもリアクションお願いします。楽しみにしてます✨日本より愛を込めて🇯🇵🫶

thank you🇯🇵

Be:First will be special guest at Ateez concert in Los Angeles. Can't wait😊

リアクションありがとうございます😊🇯🇵

Finallyyy.. i was waiting for your HUSH HUSH reaction. Thank you 😊

BE:FIRSTのリアクション動画嬉しいです❣❣❣❣

Thank you for your reaction. I am a fan of BE:FIRST. He was the first to rap and is a four-time world champion in hip-hop dancing. His dance style is poppin' and animated.

リアクションとても嬉しいです。 このコラボはとても素晴らしいです。

I always enjoy watching your reactions for XG! And finally, BE:FIRST!!😭 Ryuhei (BE:FIRST) was one of the candidates for XG. Leo (BE:FIRST) and Hervey (XG) used to work together as backup dancers before their debuts.

お二人のリアクション最高！🇯🇵

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

reaction(⁠≧⁠▽⁠≦⁠)ありがとうございます❤️Thank you so much🎶🕺✨BE:FERST×ATEEZコラボ最高⤴⤴🎉Sky-Hi💕BMSG✨

Omg I been waiting for your reaction on this ❤ best collab of the year it's nice to see a full collab of both sides rather than a 3 second appearance ❤

I've been waiting for this reaction! Love all your reaction videos of Ateez ❤

BE:FIRSTのMilli-Billiのreactionもお願いしたいです🤲

Be:first are such a talented group being ateez fan for 4 years now I have come to accept that no one can match their energy until this collab dropped.

Im waiting for this !

I've been waiting this reaction video

I love Ateez is dont this and they are never afraid to things differently

Please react to mainstream from be:first its fantastic

Did I see Ateez and automatically click? Yes. Yes I did. 😂😊❤

2:08 I think it's so creative of Hongjoong to put the first 6 words of alphabet in his rap. "A and B hold my CD Every First"

I love this song🥰 This is my favorite collab😊 ❤ 🇮🇳Sending love from India❤ 🇮🇳

I always look forward to your reactions ❤

First comment!

EARLY AND LOVE THE REACTION

Thank you for grate reaction !

Yall have to do mainstream- Befirst

I'm BESTY. I'm really happy with your reaction. I hope you'll support the 15 of us having fun.

reactionありがとう！BEFIRSTのfanです🇯🇵彼らの楽曲は幅広いので是非他の曲も聴いてみてください♪ Mainstream Masterplan Mill Bill Gifted Orchestra ver etc

If you like BE FIRST listen to Mainstream

You guys are fun as always..BTW Andy Shirt is dope,..Brand reveal pls☺️

like

We need more boy/girl group collaboration (ehem MAYFLY) any group really! we need to unite!!

I love Ateez. The song reminds me a bit of combination of NCT127 & NCT dream song...I don't know but there is a bit like that ❤❤❤

Will you guys be at BMO for their concert. I think they will do this song with 🐝🥇

I hope you guys will react to p-pop especially bini 😊

Skz mashup video reaction???

hi!! im your fan from the philippines! can you please reacti to BINI " Cherry on Top" ? BINI is an 8 member ppop group from ph!! i hope you can make a reaction video to them!!!❤

Can you please react to NCT Dream Smoothie or NCT 127 Fact Check