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BOL4's Butterfly Effect MV Behind the Scene ENG, KO, JP Sub all out!

Track #1: Butterfly Effect (나비효과) Track #2: Space (너는 내 세상이었어)

 Watch it here: EN: BOL4's Digital Single 'Butterfly Effect' Teaser Releasing on 2021.10.26. @ 6PM KST --- KO: 볼빨간사춘기 Digital Single 'Butterfly Effect' Teaser 2021.10.26. 6PM KST Release --- ZH: 脸红的思春期单曲 <蝴蝶效果> Teaser 将在 2021.10.26. @ 6PM KST 发行

 Watch it here: EN: BOL4's Digital Single 'Butterfly Effect' "Don't fly away" Moving Teaser #2 Releasing on 2021.10.26. @ 6PM KST --- KO: 볼빨간사춘기 Digital Single 'Butterfly Effect' Moving Teaser #2 "Don't fly away" 2021.10.26. 6PM KST Release --- ZH: 脸红的思春期单曲 <不要飞走> Moving Teaser #2 将在 2021.10.26. @ 6PM KST 发行

EN: BOL4's Digital Single 'Butterfly Effect' Concept Photo #3 Releasing on 2021.10.26. @ 6PM KST --- KO: 볼빨간사춘기 Digital Single 'Butterfly Effect' Concept Photo #3 2021.10.26. 6PM KST Release --- ZH: 脸红的思春期单曲 <蝴蝶效果> Concept Photo #3 将在 2021.10.26. @ 6PM KST 发行

EN: BOL4's Digital Single 'Butterfly Effect' Concept Photo #4 Releasing on 2021.10.26. @ 6PM KST --- KO: 볼빨간사춘기 Digital Single 'Butterfly Effect' Concept Photo #4 2021.10.26. 6PM KST Release --- ZH: 脸红的思春期单曲 <蝴蝶效果> Concept Photo #4 将在 2021.10.26. @ 6PM KST 发行

EN: BOL4's Digital Single 'Butterfly Effect' Concept Photo #2 Releasing on 2021.10.26. @ 6PM KST --- KO: 볼빨간사춘기 Digital Single 'Butterfly Effect' Concept Photo #2 2021.10.26. 6PM KST Release --- ZH: 脸红的思春期单曲 <蝴蝶效果> Concept Photo #2 将在 2021.10.26. @ 6PM KST 发行

EN: BOL4's Digital Single 'Butterfly Effect' Concept Photo #1 Releasing on 2021.10.26. @ 6PM KST --- KO: 볼빨간사춘기 Digital Single 'Butterfly Effect' Concept Photo #1 2021.10.26. 6PM KST Release --- ZH: 脸红的思春期单曲 <蝴蝶效果> Concept Photo #1 将在 2021.10.26. @ 6PM KST 发行

  --- EN: BOL4's Digital Single 'Butterfly Effect' Moving Teaser #1 Releasing on 2021.10.26. @ 6PM KST --- KO: 볼빨간사춘기 Digital Single 'Butterfly Effect' Moving Teaser #1 2021.10.26. 6PM KST Release --- ZH: 脸红的思春期单曲 <蝴蝶效果> Moving Teaser #1 将在 2021.10.26. @ 6PM KST 发行

EN: BOL4's Digital Single 'Butterfly Effect' Tracklist: 01. Butterfly Effect 02. You Were My World Releasing on 2021.10.26. @ 6PM KST --- KO: 볼빨간사춘기 Digital Single 'Butterfly Effect' Tracklist: 01. 나비효과 02. 너는 내 세상이었어 2021.10.26. 6PM KST Release --- ZH: 脸红的思春期单曲 <蝴蝶效果> 曲目： 01. 蝴蝶效果 02. 你曾经是我的全世界 将在 2021.10.26. @ 6PM KST 发行

Watch here: EN: BOL4 Digital Single <Butterfly Effect> Mood Sampler Watch it at: https://youtu.be/7gIRe7jijiY Releasing on 2021.10.26. @ 6PM KST --- KO: 볼빨간사춘기 Digital Single <Butterfly Effect> Mood Sampler --> https://youtu.be/7gIRe7jijiY 2021.10.26. 6PM Release --- ZH: 脸红的思春期单曲 <蝴蝶效果> Mood Sampler --> https://youtu.be/7gIRe7jijiY 将在 2021.10.26. @ 6PM KST 发行

Guest: BOL4 Watch it at:

Guest: BOL4 Watch it at:

Guest: BOL4 Watch it here:

EN: BOL4 Digital Single <Butterfly Effect> Album Scheduler Releasing on 2021.10.26. @ 6PM KST --- KO: 볼빨간사춘기 Digital Single <Butterfly Effect> Album Scheduler 2021.10.26. 6PM Release --- ZH: 脸红的思春期单曲 <蝴蝶效果> 单曲预告行程 将在 2021.10.26. @ 6PM KST 发行

EN: BOL4 IS OFFICIALLY BACK! BOL4's 'Butterfly Effect' Coming Soon! (Likely on 26 October 2021 as shown on the poster) --- KO: 볼빨간사춘기가 돌아왔습니다! 볼빨간사춘기 <Butterfly Effect> Coming Soon! --- ZH: 脸红的思春期终于回归了！ 脸红的思春期 ＜蝴蝶的效果＞ Coming Soon!

UPDATE: IMPORTANT NOTICE FOR LOBLY WHO HAD BROUGHT YOUTH FESTIVAL 2021: BOL4 will be cancelling the appearance at Youth Festival 2021 due to the COVID-19 situation in Korea. Hence it is not possible to hold the on-site concert. Therefore the concert had been postponed to next year. There will be a full refund of your ticket brought so long as you cancel the ticket before the cancellation date. For more details, please visit IG:  @bluespring_festival for the cancellation of your ticket. This will be BOL4's first appearance after haitus. BOL4 will be participating in 2021 Youth Festival on October 31, 2021 * Concert will be held both offline & online. *  You can buy your ticket at: 1. Mic Impacts School: https://bit.ly/3qCi1F5 2. Interpark: https://bit.ly/3BwIycU 3. Global Interpark: https://bit.ly/3mKxO4O 3. Naver Smart Store: https://bit.ly/3mC2apX Ticket price starts from ₩25,000. * Choose 홈페스티벌티켓 if you are from overseas and unable to attend in person! * For online tick...