Watch more ATEEZ here already: www.patreon.com/floderfloeng

I know only Ateez but Be:first seems like a group with similar energy to Ateez and they complete each other very well

The man with a deep voice wearing a beanie is SOTA. He is a top-notch dancer who has won the world hip-hop dance championship four times.

Hi, I am BESTY, a fan of BE:FIRST. This is my first time watching your channel and I really enjoyed it. BE:FIRST is a Japanese 7 member boy group that debuted in 2021 through BMSG, an agency founded by rapper SKY-HI. ATEEZ attended a dance live concert organized by BMSG last year and became friends with BE:FIRST. BE:FIRST does not have a lead singer or rapper, but each member sings, raps and dances. They also write lyrics, compose music and choreograph their own music. The member SOTA has won the World Dance Competition four times and has been supporting the dancers of the ATEEZ. Every song they release is in a different genre, but I recommend checking out “Mainstream”, “Boom Boom Back” and “Masterplan”. BE:FIRST is not well known yet, but they are very talented artists, so please keep an eye out for them.

BEFIRST is a group whose members are very much music geeks themselves and respect HIPHOP culture.The blue-haired boy who turned around after the big stop is RYUHEI, the youngest at 17. When it comes to Matrix Vibes, it is "Mainstream" and "Masterplan" by BEFIRST!Definitely you should watch!

BE: FIRST est un groupe japonais

BE:FIRST is a famous japanese boygroup

Yes, you are already an Atiny, and Be first is an equally complete and great group ❤

リアクションありがとうございました！besty（be firstのファンネーム）です。 mainstreamとmasterplanが最近リリースしたものです。 他にも、Milli-Billi、scream、Boom Boom Backなどがオススメです！（他にもたくさんありますが） リアクション楽しみにしています！

Please react to BE:FIRST - Mainstream MV. It´s FIRE!!!

Collaboration of the Year🔥🔥

Hello from Japan🇯🇵 I really enjoyed your video! I’m so happy if you check more more BE:FIRST. The latest release is called mainstream. They are the real deal! Believe me!

BE:FIRST is a Japanese hip-hop boy group and they’re amazing. Would be so happy if you check out some of their songs. Mainstream, Gifted and their latest release Masterplan along with dance practices

Love the collab..both groups just sound like one big groupa

I need more BE:FIRST songs. Thanks for your reaction!

OMG, thank you very much It's like watching myself watching it, my excitement level was high I was speechless and felt something inside me explode, And that only made me love and admire them even more And BE:FIRST were amazing

Be:First doesn't have a set leader or set positions as each member was selected for being the best of the best, therefore all 7 have equal standing

Thank you for your reaction. BE:FIRST is a popular boy band in Japan with high quality singing, rap and dancing. I would love to see your reaction to their other works. My recommendations are "Masterplan", "Mainstream" and "Boom Boom Back"🇯🇵

Collaboration of the century!!! What makes this so special is that all of them are equally highlighted, and it sounds like 1 group, instead of 2.

Una perfecta colaboración!❤

This is Atiny. Of course the music is great, but MV is really cool! ! There are so many people, and yet each one of 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. Ateez, literally broke the glass barrier (Koreia/Japao), to join the 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 affecting and now better. What a pride of both. Thanks for this executive gift. That collab top. OMG.⏳🔥❤👏👏

Thanks for reacting to this collab ❤❤❤

For sure, it is one of the best collaboration ever!!!! I can't stop watching the MV in repeat. Like it's too good! Also I loved the fact that all the members of BE:FIRST & ATEEZ got the screentime, like I honestly didn't expected it to be this! Thank you for reacting. I don't know if you've watched till the very end or not, but they mentioned all the staffs team and gave credit to both of the groups' team. ❣

Thank you for the reaction BE: FIRST is very popular in Japanese groups. In the third year of debut, the fans are delighted to be able to collaborate with the great senior ATEEZ♥️

リアクションありがとうございました。日本より愛を込めて❤️

This is such a great colab!!!

thank you🇯🇵

Collaboration of the year for sureeee it’s sooo good!

Jeder einzelne hatte den Raum zu glänzen und wenn man es nicht besser wüsste könnte man denken es ist eine Band. Es passt einfach alles und ich brauche ein ganzes Collab Album.

Be First formed in and debut in 2021 when they won a musical reality show called The First. They are 7 members named at the end of this video.

if u want a perfect introduction to be:first, you should watch their "gifted orchestra ver. "

Thank you for your reaction. I'm really happy that ATEEZ collaborated with us. BE:FIRST is a group that values individuality. The members have choreographed our recent songs, so you can enjoy choreography that you don't see very often elsewhere. Please give your reaction to our other songs as well.

リアクションありがとうございます😊BE:FIRSTのファンです。ATEEZさんとのコラボ、とても嬉しいです♡

BE:FIRST all 7 members can sing, rap, and dance. They always perform with a hand microphone, that's how much they are particular about showing their singing quality. SOTA is like a tribe chief for dance performance who has choreographed several songs already. SHUNTO has a wide range of voice and his low vocal fry is golden. MANATO always has perfect and stable pitch. RYUHEI is the youngest member who's still in high school now and he can dance to any genre of music. JUNON is the oldest member who has very beautiful high-tone voice. RYOKI has explosive performance skills who is also an actor. LEO is like everyone's mom who makes the group shine as well as himself.

Thank you so much! I am BESTY(fan of BE:FIRST). I am very happy to see you react to Hush-Hush, and enjoyed it. Please watch the music videos of BE:FIRST. Their live performance is spectacular!

リアクションありがとう☺️🫶✨🇯🇵 またBE:FIRSTのMainstreamのreactionをお願いします🙏🙏🙏✨

Thank you ATEEZ and you for knowing BE:FIRST through this collaboration✨♥️ BE: FIRST is a Japanese boy group that debuted for about 2 years and 8 months, but its singing and dancing skills are outstanding, and its live performance is especially cool‼︎ Please take this opportunity to do a BE:FIRST reaction video too 🙌✨💖

(*´∀`*)ﾉﾞHELLO～★ BE:FIRSTのリアクションありがとうございます✨ ATEEZさんとのコラボは最高です！ DancePracticeの動画も出るといいですね💕 その時はまたリアクションよろしくお願いします✨ (⁎˃ᴗ˂⁎) thank you♡🇯🇵BESTY

Thank you for your reaction. Some members of BE:FIRST actually have something in common with XG. Ryuhei was originally the only boy to be a candidate for the XG project. Leo and Harvey were trainees together at avex. I hope to see more BE :FIRST reactions from you in the future!

befirstのファンです。 リアクションありがとうございます。 befirstの 「mainstream 」 「master plan」の リアクションお願いします

Reactionありがとうございます！！楽しかったです✨ぜひBE:FIRSTもチェックしてください

This was such a great collaboration. I feel like they all got highlighted at least a little and they blended really well vocally. I hope we get to see a behind the scenes!

Please reaction BE:FIRST Mainstream and Boom Boom Back live ver🔥

Thank you for your reaction! BE:FIRST is a Japanese group of seven geniuses in singing and dancing. I hope their collaboration with ATEEZ will increase their recognition. I hope that through this reaction video, K-pop fans will get to know BE:FIRST and J-pop!

最高なコラボですね✨

Reactionありがとうございます！嬉しいです またBE:FIRSTの楽曲のReactionを楽しみにしています 😊

This mv, makes them look like one big group,,, the chemistry are blended well❤❤

thank you. reaction 😊 BE:FIRST のおすすめは mainstream❤です！

As a fan of BE:FIRST, I love this collaboration. I am glad that you, being an AITINY, are happy with it too!

Hello🎉 thank you

𝐓𝐡𝐚𝐧𝐤 𝐲𝐨𝐮 for reaction🙌✨ From JAPAN🇯🇵 BESTY(BE:FIRST fan name)❤

ATEEZ is my fave Korean group and BE:FIRST is my fave Japanese group. They have some really great songs. Mainstream was my first song followed by Saliva and Glorious. All amazing songs and their newest one Masterplan is 🔥🔥 The song is the greatest colab I have heard. I need more!! A behind, dance practice, just more!!! They sound so good together!! Great reaction!! Have a lovely day/night and see you next time!!🏴‍☠💜

はじめまして リアクションありがとうございます とても楽しい動画でした ぜひBE:FIRSTの他の曲もチェックしてみてください

Thank you for introducing this music video. I am so happy to see a K-pop boy group and a Japanese pop boy group collaborating together. I highly recommend watching BeFirst's “Mainstream” and “Masterplan”. Sota, who is a member of BeFirst, sings rap in a deep voice in this music videos. He is a top-level dancer and choreographer in Japan, and he choreographed their dances, blending popping and hip-hop in a very unique style. BeFirst is produced by SKY-HI, who also has a collaborative project called D.U.N.K., which featured a live event with Ateez last year. SKY-HI is a genius at artist collaborations. Additionally, SKY-HI produced Mazzel last year. They are an amazing group as well. I recommend you watch their songs “Counterattack” and “Parade”.

This has to be one of the best collaborations of the year! It is so good! I get goosebumps ever time I hear it and I’ve heard it on repeat since the release!

コラボリアクション動画有り難うございます！ 相性が良く最高ですよね✨ 興奮しました 👍🎌😘

初めまして‼︎ BE:FIRST💙✖️ATEEZ❤ 最高なコラボです。15人それぞれに華があり、とてもカッコイイ❤︎❤︎ダンスも最高‼︎ 私はBESTY(BE:FIRSTのファンネーム)なので、これからBE:FIRSTの楽曲をチェックしてくださると嬉しいです。 初めは「Masterplan」か「Mainstream」「Boom Boom Back」をおすすめします。彼らの音楽はジャンルレスです。沢山の楽曲があるので、それらを聴いて楽しんでもらえたら嬉しいです❤❤

Thank you🌟🌟🌟

リアクション動画ありがとうございます🫶🫶🫶 嬉しいです🥰🇯🇵

BE:FIRSTのファンです！ 最高のリアクションをありがとうございます！🖤チャンネル登録しました^_^ 🎶mainstream 🎶masterplan🎶 milibili 🎶boom boom back おすすめのMVです、よかったらリアクションしてくれたら嬉しいです✨

楽しいリアクションありがとう。私はBESTYですが、このリアクションを見て、ATEEZがより好きになりました。他のリアクションも見てみますね。

リアクションありがとうございます✨ もっとBe：FIRSTを知っていただけとら嬉しいです😊 MANATOの名前が聞こえたように思ったのですが？😅 Be：FIRSTのMANATOでしょうか？ 今回の楽曲せいさくに参加しています😊

Thanks for the reaction❕❤️‍🔥 Here comes the hottest song🥵🎶 BE:FIRST is an artist who loves music and dance😊

ありがとうございます🥹💙❤

🇯🇵BE:FIRST kzfaq.info/sun/PLQdEvhyiqTrUcV39YE3mUXT9vryj_ahM9

リアクションありがとうございます😊❤❤

Bin riiiiiesiger BE:FIRST Fan (auch genannt BESTY) und ich liebe diese Collab so sehr 🥺🥺 schau dir gern mehr von ihnen an, es lohnt sich sowas von 🤞 ich finde Boom Boom Back und Betrayal Game sind unter anderem deren größte Banger!!!!!! Ne Reaction darauf wär mega 💖

I'm a fan of BE:FIRST. BE:FIRST is a group that has only been around for less than three years, but there is no doubt they will be a big success in the future.The blue-haired boy who turns around is the youngest, 17 years old.

Thank you for the reaction of BE:FIRST & ATEEZ ♪ I hope you will continue to enjoy ATEEZ & BE:FIRST's music together❤😊🇯🇵

I don't know if you know because you didn't watch it till the end, but Hongjoong and Mingi from ATEEZ took part in writing the lyrics!

リアクションありがとうございます😊

Reactionありがとう❤

リアクションありがとうございます🙏嬉しいです🙏🙏✨😊

Thank you for your reaction! It's a great collaboration! ! BE:FIRST is a Japanese dance and vocal group that debuted in 2021! They value each other's individuality, and their songs span a variety of genres. In particular, the songs that strongly represent their musicality are "Boom Boom Back," "Mainstream," and "Masterplan" (in order of release). There is also an MV! It won't hurt to see it! ! I strongly recommend you see it! I'm waiting for your reaction! ✨❤️‍🔥

BE:FIRST is a 7 member Japanese group under BMSG. They were formed through the audition program BSMG AUDITION - THE FIRST 21. They debuted on November 3, 2021, with the single album “Gifted“. Members: Ryoki - the one with buzz cut he acted in the movie “High & Low the Worst X“ with Yuta from NCT 127 Sota - the one at the beginning with deep voice he is a professional dancer with 4 world titles under his belt Ryuhei - the youngest member with blue hair Manato - 4:52 blondish fluffy hair Junon - 7:45 he's the main vocalist and the eldest Leo - 6:00/7:56 the mood maker and unofficial leader of the group Shunto - 6:40 brown curly hair Recommendations: "Mainstream" "Bye-good-bye" (which i love bcs it's very different from their usual style) "Masterplan" "Gifted" "Boom Boom Back"

Thank you for reaction ❤ BEFIRST 🎶MainStream 🎶MilliBilli 🎶Masterplan MV Please take action! They live best! BEFIRST ＆ ATEEZ ❤

BE:FIRST is a 7-member Japanese boy band that debuted in November 2021 after being selected by audition for Japanese rapper SKY-HI. They love HipHop, and their performance style is to sing and dance to all genres of music with a hand microphone. They will perform at many Japanese rock festivals. Hush Hush is available on BE:FIRST's official channel, so please check out their other music videos! Masterplan" and "Mainstem" are high quality music videos.

I"m BESTY😀 reaction　Thank you😊✨ BE:FIRST&ATDDZ soooooo cool🔥✨🔥✨go go🔥

They're not kpop they're japanese, the song is in japanese - literally everything that Ateez does out of Japan is incredible, add BE:FIRST heck this collab is nothing like you see in kpop where the groups are actually integrated. Jaw on the floor the whole time.

thank you🎉

you should react to the be:first-boom boom back MV.

Thank you for your reaction!!❤ 3:11 RYUHEI 06 3:48 RYOKI 99 4:17 SOTA 01(00) 4:52 MANATO 01 6:40 SHUNTO 03 7:46 JUNON 98 7:56 LEO 98 They perform all songs with live hand microphones. Please watch the live video as well as the music video! With love from Japan❤

Thank you for your reaction💕I was enjoying the video with you ❣️Deep voice ‘s man 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 n KYOCERA DOME OSAKA" by SKY-HI,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 check Masterplan,Mainstream of BE:FIRST,too. From Japan ❤️🇯🇵

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

HOLY MOLY !! 🤯🤯🤯

Thanks for reaction ateez .. and don't forget to reaction ateez again❤❤❤

Thank you for this reaction video 💙 My personal favorite watch for BE: first is Gifted. - orchestra version and you might want to watch the original first and then watch orchestra version ❤️ Thanks again 💜

it is wonderful

Thank you for your very nice feedback. If you like, please check out BE:FIRST's latest song "Masterplan". kzfaq.info/get/bejne/bJyWdLmBzcWdmmg.htmlsi=iFtO5f4U9cOFX9G4

fun fact Sota from be first use to be a back up dancer for Ateez!

Thank you for finding BEFIRST🎉 Recommended "Master Plan" MV ＆ Dance Plactice ver

Thank your for reaction! Please checkout also their song "empty box" and also other songs.

INCREDIBLE !!

hush-hushリアクションありがとうございます。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今回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！BE:FIRSTに興味持っていただきありがとうございます。彼らは7人が高音も低音もラップスキルが高いです。彼らの歌声を楽しむならTHE FIRST TAKEのBye-good-bye , Smile Again , 公式ライブ映像のSalvia お勧めです。どのMV映像も楽しいですし、ライブ映像は圧巻です。どれも公式で見られますのでリアクションお願いします♪

この物語はSKY-HIというラッパーから始まっています。是非BMSGについても知ってほしいな

Thank you for reacting. There are many MV of BE:FIRST. But their "Live" performances are much better than MV. If you interested in them, how about look their You Tube. Milli Billi, Mainstream, Masterplan, Salvia, Scream and so on. (These are title of their songs.)

Thank you for your reaction. For your reference, this is BF’s LIVE stream. BE:FIRST 1st One Man Tour "BE:1" 2022-2023 -Digest- (kzfaq.info/get/bejne/aMucZd2Qt5ybfI0.html)

Love your videos 💕❤💖

HOLY MOLY !!! 🤯🤯🤯🤯

CRAZY !!!