· Debut release
Debut release: 미생 OST Part.4
First documented Single in the MusicBrainz discography.
source: musicbrainz
Tier 3 · vertical & regional
Bolbbalgan4
Group · South Korea · Yeongju · formed 2016
South Korean Band
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Also known as BOL4 · 볼빨간사춘기 · Bolbbalgan4 · 臉紅的思春期 · 赤頬思春期
Timeline
10 events✦ Award 4+ Member joins 2★ Debut release 1◆ Formed 1▣ Album 1− Member leaves 1
2010s
· Member joins
안지영 joins the band
original
source: musicbrainz
· Member joins
우지윤 joins the band
original
source: musicbrainz
2020s
· Member leaves
우지윤 leaves the band
original
source: musicbrainz
Biography
English biography361 words · 6 sectionssource: wikipedia-en · licence CC BY-SA 4.0 · revision 1379175702
Biography
BOL4 (Korean: 볼빨간 사춘기; RR: Bolppalgan Sachungi), also known as Bolbbalgan4 or Blushing Youth (赤頬思春期, Akahō Shishunki), is a South Korean musical act formed by Shofar Music in 2016. They appeared on Superstar K6 in 2014 before signing a contract with their current agency. BOL4 was originally a duo consisting of Ahn Ji-young and Woo Ji-yoon. They debuted with the single "Fight Day" from the mini-album Red Ickle
RED ICKLESpotify (search)YouTube Music (search)Tracklist · 5 tracks1초콜릿3:092싸운날3:093반지2:574심술2:385가끔씩3:43 on April 22, 2016.
The duo went on a temporary hiatus due to Ahn's music classes requirements in the first half of 2018. BOL4 signed with King Records and debuted in Japan on June 5, 2019, with the mini-album Red Planet (Japan Edition)
RED PLANET (JAPAN EDITION)SpotifyYouTube Music (search)Tracklist · 8 tracks · 2 discsDisc 11宇宙をあげる3:362好きだと言って3:243喧嘩した日3:114You(=I)2:535意地悪2:416私だけダメな恋3:41Disc 21宇宙をあげる (Music Video)2宇宙をあげる (MV Making Movie).
On April 2, 2020, Shofar Music announced that Woo Ji-yoon had left the duo and that Ahn Ji-young will continue to promote as BOL4. In April 2025, BOL4 parted ways with their agency after 10 years of working with them.
Name
The group's name in English comes from the first syllable of the Korean word sachungi ("puberty"), which is pronounced the same as the Sino-Korean numeral four (sa).
Formation
Ahn Ji-young and Woo Ji-yoon were both raised in Yeongju, North Gyeongsang Province, and were classmates. They had previously competed on Superstar K 6 in 2014. Since they were young, they had dreamed of becoming singers. The name of their duo was chosen because they wanted to make the kind of pure, honest music that can only be found in adolescence. Woo portrays the "blushing" part of the name because she is often shy, while Ahn portrays "youth" because she acts like an adolescent girl.
Former
Woo Ji-yoon (우지윤) – guitar, rapping, backing vocals
Headlining concerts and tours
BOL4 1st Solo Concert "Red Planet
RED PLANETSpotifyYouTube Music (search)Tracklist · 11 tracks1우주를 줄게3:352싸운날3:103You(=I)2:514심술2:395나만 안되는 연애3:416초콜릿3:127프리지아3:078X Song3:489반지3:0010사랑에 빠졌을 때3:5311우주를 줄게 (Radio edit)3:22" (2016)
BOL4 1st Concert in Taipei (2017)
BOL4 2nd Solo Concert "Imagine" (2017–2018)
BOL4 3rd Solo Concert "Travel" (2018)
BOL4 Spring Solo Concert "Flower Energy" (2019)
BOL4 Asia Tour "Blossom" (2019)
BOL4 Tour Concert "Two Five
Two FiveSpotify (search)YouTube Music (search)Tracklist · 6 tracks1Workaholic3:112253:163XX3:154Taste3:065낮 (Day off)3:136XX (Acoustic Ver)1:35" (2019)
BOL4 (赤頬思春期) Japan Live Tour "Love" (2020)
BOL4 Concert "Seoul
SeoulSpotifyYouTube Music (search)Tracklist · 5 tracks1Love story2Seoul3What make us beautiful4In the mirror5Star" (2022)
BOL4 Concert in Taipei (2023)
BOL4 Concert "Love.zip
Love.zipSpotifyYouTube Music (search)Tracklist · 5 tracks1Chase Love Hard3:012FRIEND THE END3:083Rome2:444When love becomes goodbye3:485Good night1:37" (2023)
BOL4 Asia Tour "Love.zip" (2023)
BOL4 Concert "Bloom
BloomSpotifyYouTube Music (search)Tracklist · 1 track1Bloom3:09" (2024)
BOL4 Asia Tour "Bloom" (2025)
BOL4 Concert Tour "Red Square" (2026–2027)
Showcase
BOL4 (赤頬思春期) 1st Live Showcase 宇宙をあげる～ (2018)
Discography & profile
Normalised profile
Percentiles are computed over every artist in the database, so a tier-3 artist can still sit in the 95th percentile on a single axis.
| Metric | Value | Percentile |
|---|---|---|
| Wikipedia language versions | 18 | 78.1th |
| Spotify monthly listeners | — | no data |
| Release groups in DB | 35 | 91.7th |
| Studio albums | 1 | 76th |
| Awards recorded | 4 | 96.3th |
| Timeline events | 10 | 86.7th |
| Recording span (years) | 12 | 30.2th |
| Genres | 7 | 93th |
Percentiles are computed at render time; missing values mean the artist has no data on that axis.
Discography (35 release groups · 1 studio albums)
Albums · 1
2016 · studio album
Search SpotifySearch YouTube Music
Tracklist · 11 tracks · 36:18
1우주를 줄게3:352싸운날3:103You(=I)2:514심술2:395나만 안되는 연애3:416초콜릿3:127프리지아3:078X Song3:489반지3:0010사랑에 빠졌을 때3:5311우주를 줄게 (Radio edit)3:22
Single · 24
| Cover | Year | Title | Notes | First release |
|---|---|---|---|---|
| 2014 | 미생 OST Part.4Search SpotifySearch YouTube MusicTracklist · 2 tracks · 8:461가리워진 길4:23 2가리워진 길 (Inst.)4:23 | Soundtrack | 5 December 2014 | |
| 2016 | 쇼파르뮤직 컴필레이션 Vol.2 'Romantic Wish'Search SpotifySearch YouTube MusicTracklist · 1 track · 4:151Romantic Wish4:15 | 8 January 2016 | ||
| 2016 | 좋다고 말해Search SpotifySearch YouTube MusicTracklist · 1 track · 3:271좋다고 말해3:27 | 21 December 2016 | ||
| 2017 | 군주 - 가면의 주인 OST Part.2Search SpotifySearch YouTube MusicTracklist · 2 tracks · 6:481처음부터 너와 나3:24 2처음부터 너와 나 (inst.)3:24 | Soundtrack | 17 May 2017 | |
| 2017 | 모해Search SpotifySearch YouTube MusicTracklist · 2 tracks · 6:461모해 (mohae)3:23 2모해 (mohae) (inst.)3:23 | 23 May 2017 | ||
| 2017 | 남이 될 수 있을까Search SpotifySearch YouTube MusicTracklist · 1 track · 3:151남이 될 수 있을까3:15 | 13 June 2017 | ||
| 2018 | #첫사랑Search SpotifySearch YouTube MusicTracklist · 1 track · 3:271#첫사랑3:27 | 10 January 2018 | ||
| 2018 | Red Diary “Hidden Track”Search SpotifySearch YouTube MusicTracklist · 2 tracks · 5:461Dejavu3:01 26 o’clock2:45 | 17 July 2018 | ||
| 2018 | Hurry upSearch SpotifySearch YouTube MusicTracklist · 1 track · 3:001Hurry up3:00 | 18 October 2018 | ||
| 2018 | My TroubleSearch SpotifySearch YouTube MusicTracklist · 1 track · 3:171My Trouble3:17 | 15 November 2018 | ||
| 2019 | RED PLANET (JAPAN EDITION)Search SpotifySearch YouTube MusicTracklist · 8 tracks · 19:26Disc 1 1宇宙をあげる3:36 2好きだと言って3:24 3喧嘩した日3:11 4You(=I)2:53 5意地悪2:41 6私だけダメな恋3:41 Disc 21宇宙をあげる (Music Video) 2宇宙をあげる (MV Making Movie) | 5 June 2019 | ||
| 2019 | New YorkSearch SpotifySearch YouTube MusicTracklist · 1 track · 4:191New York4:19 | 27 November 2019 | ||
| 2020 | 쇼파르뮤직 컴필레이션 Vol.3 '어색한 사이'Search SpotifySearch YouTube MusicTracklist · 2 tracks · 7:061어색한 사이3:11 2행복은 늘 가까이에 있어3:55 | 15 January 2020 | ||
| 2020 | 나비와 고양이 (Leo)Search SpotifySearch YouTube MusicTracklist · 1 track · 3:081나비와 고양이 (Leo)3:08 | 7 May 2020 | ||
| 2020 | LOVE (Kocyamarü remix)Search SpotifySearch YouTube MusicTracklist · 1 track · 2:301LOVE (Kocyamarü remix)2:30 | 7 July 2020 | ||
| 2020 | Our Beloved BoA #2 - SM STATIONSearch SpotifySearch YouTube MusicTracklist · 2 tracks · 7:021아틀란티스 소녀 (Atlantis Princess)3:31 2아틀란티스 소녀 (Atlantis Princess) (inst.)3:31 | 7 August 2020 | ||
| 2020 | FilmletSearch SpotifySearch YouTube MusicTracklist · 3 tracks · 10:381빨간 립스틱3:15 2Dancing Cartoon3:17 3바다를 사랑할 거야 (Demo Ver.)4:06 | 4 November 2020 | ||
| 2021 | Butterfly EffectSearch SpotifySearch YouTube MusicTracklist · 2 tracks · 8:001나비효과3:26 2너는 내 세상이었어4:34 | 26 October 2021 | ||
| 2023 | 여름날Search SpotifySearch YouTube MusicTracklist · 1 track · 3:021Someday3:02 | 5 July 2023 | ||
| 2024 | BloomSearch SpotifySearch YouTube MusicTracklist · 1 track · 3:091Bloom3:09 | 23 October 2024 | ||
| 2026 | 마음을 잃다 (베일드뮤지션 X 볼빨간사춘기 with 여의도동 쓰리스타)Search SpotifySearch YouTube MusicTracklist · 2 tracks · 8:281마음을 잃다 (베일드뮤지션 X 볼빨간사춘기 with 여의도동 쓰리스타)4:14 2마음을 잃다 (베일드뮤지션 X 볼빨간사춘기 with 여의도동 쓰리스타) (Inst.)4:14 | 13 January 2026 | ||
| 2026 | Find YouSearch SpotifySearch YouTube MusicTracklist · 3 tracks · 9:431Find You2:55 2아름다운 안녕3:15 3나를 봄으로 데려가!3:33 | 22 April 2026 | ||
| 2026 | Someday (from 오늘도 매진했습니다 OST Part 6)Search SpotifySearch YouTube MusicTracklist · 2 tracks · 5:301Someday2:45 2Someday (inst.)2:45 | Soundtrack | 6 May 2026 | |
| 2026 | 여름아 부탁해Search SpotifySearch YouTube MusicTracklist · 1 track · 3:491여름아 부탁해3:49 | 22 July 2026 |
EP · 10
| Cover | Year | Title | Notes | First release |
|---|---|---|---|---|
| 2016 | RED ICKLESearch SpotifySearch YouTube MusicTracklist · 5 tracks · 15:361초콜릿3:09 2싸운날3:09 3반지2:57 4심술2:38 5가끔씩3:43 | 22 April 2016 | ||
| 2017 | Red Diary Page.1Search SpotifySearch YouTube MusicTracklist · 5 tracks · 15:501썸 탈꺼야3:01 2Blue3:06 3고쳐주세요3:06 4상상2:55 5나의 사춘기에게3:42 | 28 September 2017 | ||
| 2018 | Red Diary Page.2Search SpotifySearch YouTube MusicTracklist · 7 tracks · 25:171바람사람3:36 2여행3:40 3야경3:28 4안녕, 곰인형3:22 5Clip3:54 6Lonely3:37 7여행 (inst.)3:40 | 24 May 2018 | ||
| 2019 | 사춘기집Ⅰ 꽃기운Search SpotifySearch YouTube MusicTracklist · 5 tracks · 18:411나들이 갈까3:07 2나만,봄3:39 3별 보러 갈래?3:23 4Seattle Alone3:36 5Mermaid4:56 | 2 April 2019 | ||
| 2019 | Two FiveSearch SpotifySearch YouTube MusicTracklist · 6 tracks · 17:361Workaholic3:11 2253:16 3XX3:15 4Taste3:06 5낮 (Day off)3:13 6XX (Acoustic Ver)1:35 | 10 September 2019 | ||
| 2020 | LOVESearch SpotifySearch YouTube MusicTracklist · 5 tracks · 12:31Disc 1 1LOVE3:07 2BLUE3:09 3LOVE [Instrumental]3:07 4BLUE [Instrumental]3:08 Disc 21LOVE [Music Video] | 15 January 2020 | ||
| 2020 | 사춘기집Ⅱ 꽃 본 나비Search SpotifySearch YouTube MusicTracklist · 5 tracks · 16:461빈칸을 채워주시오3:04 2품3:06 3나비와 고양이3:08 4카운슬링3:25 5민들레4:03 | 13 May 2020 | ||
| 2022 | SeoulSearch SpotifySearch YouTube MusicTracklist · 5 tracks1Love story 2Seoul 3What make us beautiful 4In the mirror 5Star | 20 April 2022 | ||
| 2023 | Love.zipSearch SpotifySearch YouTube MusicTracklist · 5 tracks · 14:181Chase Love Hard3:01 2FRIEND THE END3:08 3Rome2:44 4When love becomes goodbye3:48 5Good night1:37 | 16 April 2023 | ||
| 2023 | Merry Go RoundSearch SpotifySearch YouTube MusicTracklist · 5 tracks · 16:411Goodbye my love3:06 2Snowball3:33 3Eternal love3:45 4Miss u, dear3:10 5Love3:07 | 12 December 2023 |
Stats & PK
Percentile within all 23,672 published artists.Put Bolbbalgan4 head-to-head →
| Metric | Value | Percentile |
|---|---|---|
| Wikipedia language versions | 18 | 78.1th |
| Spotify monthly listeners | — | no data |
| Release groups in DB | 35 | 91.7th |
| Studio albums | 1 | 76th |
| Awards recorded | 4 | 96.3th |
| Timeline events | 10 | 86.7th |
| Recording span (years) | 12 | 30.2th |
| Genres | 7 | 93th |
Awards & honours
| Year | Award | Category | Result |
|---|---|---|---|
| 2016 | Melon Music Awards | won | |
| 2017 | Circle Chart Music Awards | won | |
| 2017 | Golden Disk Awards | won | |
| 2017 | Korean Music Awards | won |
Line-up
| Name | From | To | Role |
|---|---|---|---|
| 안지영 | 2016 | present | original |
| 우지윤 | 2016 | 2 April 2020 | original |
Where this record comes from
portrait—Wikimedia Commons · CC BY 2.0 · retrieved 11 October 2026
https://commons.wikimedia.org/wiki/File:LG%EC%A0%84%EC%9E%90%2C_%E2%80%98LG_G6%E2%80%99%EB%A1%9C_%EC%A0%9C%EC%9E%91%ED%95%9C_%EC%9D%8C%EC%9B%90_%EA%B3%B5%EA%B0%9C_%2833965400595%29_%28cropped%29.jpgaliases/urls—musicbrainz · CC0 · retrieved 10 October 2026
https://musicbrainz.org/artist/3529da27-3a5d-45bb-9308-4d131132a21ediscography—musicbrainz · CC0 · retrieved 10 October 2026
https://musicbrainz.org/artist/3529da27-3a5d-45bb-9308-4d131132a21ecore—wikidata · CC0 · retrieved 10 October 2026
https://www.wikidata.org/wiki/Q26960605genre—wikidata · CC0 · retrieved 11 October 2026
https://www.wikidata.org/wiki/Q26960605seed-list—wikipedia · CC BY-SA 4.0 · retrieved 10 October 2026
https://en.wikipedia.org/wiki/BOL4biography—wikipedia-en · CC BY-SA 4.0 · retrieved 10 October 2026
https://en.wikipedia.org/wiki/BOL4
Why this artist is in the database
- List of K-pop artists
Tier rule: curated genre/region list
Image: LG전자 · CC BY 2.0 · Wikimedia Commons
Wikidata: Q26960605 · MusicBrainz: 3529da27-3a5d-45bb-9308-4d131132a21e
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