KPOP 4th generation · 8D Entertainment
OnlyOneOf
オンリーワンオブ / 온리원오브
OnlyOneOf work in low, R&B-based art pop and choreograph the distance between bodies as carefully as the steps.
- 2019DebutMay 28, 2019
- 6Members
- 4thGeneration
- lyOnFandom
Last updated:
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In 30 seconds: OnlyOneOf
KB, RIE, YOOJUNG, JUNJI, MILL and NINE run a concept that continues even through the capitalisation of the song titles.
Start here for the most intimate staging in Korean pop, handled with more seriousness than the subject usually gets.
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Key facts
- Group name
- OnlyOneOf
- Reading / Hangul
- オンリーワンオブ / 온리원오브
- Company
- 8D Entertainment
- Debut date
- May 28, 2019
- Days active
- 2,713 days (7 years, 5 months)
- Debut song
- savanna / time leap
- Generation
- 4th generation
- Fandom name
- lyOn(ライオン)
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Member guide
Profile comparison
| Members | Birth date | Blood type | MBTI | Nationality | ||
|---|---|---|---|---|---|---|
| ケイビー | 1992-04-23 | 34 | 180cm | AB | Not disclosed | South Korea |
| リエ | 1996-11-06 | 29 | 174cm | A | ISFP | South Korea |
| ユジョン | 1997-05-29 | 29 | 176cm | A | Not disclosed | South Korea |
| ジュンジ | 1998-04-06 | 28 | 181cm | B | ENFJ | South Korea |
| ミル | 1999-03-30 | 27 | 171cm | B | Not disclosed | South Korea |
| ナイン | 1999-12-13 | 26 | 177cm | O | Not disclosed | South Korea |
Ages are as of 2026-10-31.
Selected releases
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Start here
Follow a few songs from the starting point to the group's current sound.
savanna MVsavanna is the debut, low and slow, with the original line-up in place.
libidO MVlibidO is the signature, and the video and the practice cut show two different versions of the same idea.
seOul drift MVseOul drift carries the urban pace of the current line-up, on video and on stage.MVView in JapaneseDance PracticeView in JapanesePerformanceView in JapaneseLiveView in JapaneseStageView in Japanese
View all official videos →05
From debut to now
- 2019May brought the debut with savanna and time leap, and Line Sun Goodness in October widened the world as far as sage.
- 2020After dOra maar came a producer-led series holding angel and a sOng Of ice & fire, widening the range of the R&B.
- 2021libidO, from Instinct, Pt. 1, showed the intimacy and group choreography they are known for, and mOnO and melting snOwman followed later in the year.
- 2022skinz, from Instinct, Pt. 2, showed the six-piece line-up, and in Japan came an EP holding suit dance and a Japanese-language song.
- 2023The Japanese EP chrOme arts and the 7-track seOul cOllectiOn arrived, with the music video and the Stage Practice for seOul drift.
- 2024The 5-track EP Things I Can't Say LOve arrived, and the video and the Choreography footage for dOpamine showed how tightly the six move together.
- 2025February brought the one-track single Stay, adding a new vocal song to a catalogue running since 2019.
- 2026Broadcast footage runs as far as July, and the six have carried on performing on stage, older songs included.
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Achievements
Key milestones
Verified information
Verified English information is not yet available for this section.
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Official links
Official social accounts and platforms
Shopping guide
Verified English shopping links are not yet available.
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KPOP DISCOVER's OnlyOneOf note
Filing OnlyOneOf under 'sensual songs' blurs the outline. R&B recorded with the voices close and choreography that keeps rearranging the distance between members are drawing the same subject. Play the music video for libidO and then the Dance Practice, and that design shows itself fastest.
Moving from the early savanna and sage on to skinz, seOul drift and dOpamine, the visuals do not get louder; the relationship between gaze and body gets more precise. Follow the Japanese releases as well and it becomes clear that the same aesthetic holds across changes of language and market.
Editors' take Watch past the music videos to the choreography footage and it becomes clear that the sound and the bodies of OnlyOneOf are telling one story.
Trivia worth knowing
Debut
The first two entries in the streaming catalogue are the three-track "dot point jump" Vol. 1 and its Vol. 2 companion, which arrived the following week.
Activity
The official YouTube channel holds 646 videos, and the 62 gathered for registration all carry a verified publication date.
Members
Broadcaster listings still carry former member LOVE while current members KB and MILL are absent, so the six-member line-up is kept separate from those records.
Activity
libidO exists in three forms on the official channel — the standard music video, the Guilty Pleasure Ver. and the choreography cut.
Activity
Between 2022 and 2023 the streaming catalogue gains four entries: a Japanese best-of, suit dance, a Japanese-titled cover and chrOme arts.
Activity
Broadcaster fancams number 476 in total, while individual fancams stay out of the group video listing.
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Japan activity score
KPOP DISCOVER original metric
No. 64/ 241 groups
No. 64 of 241 groups with recorded activity in Japan (top 27%)
- 4Japanese releases
- 20Japan-related tracks
- 0Members from Japan
- 0Official Japanese accounts
The denominator is the 241 groups, out of 564 covered by KPOP DISCOVER, whose raw score reaches at least one point. The score adds 10 points per Japanese-market release, 3 per Japan-related track, 12 per member from Japan, and 8 per official Japanese account. Japanese-market releases carry the most weight because they are the most direct evidence of activity; related tracks add track-level detail; members from Japan stand for Japanese-language communication and continuity; official accounts stand for a permanent point of contact. The weights are an editorial judgement, not a statistical optimisation, and the ranking tracks release volume in Japan closely. Source: releases, tracks, members, and official links recorded by KPOP DISCOVER (updated 2026-10-24).
How this score is calculated →View in JapaneseFrequently asked questions
What defines OnlyOneOf?
KB, RIE, YOOJUNG, JUNJI, MILL and NINE run a concept that continues even through the capitalisation of the song titles.
Why should a new listener start with OnlyOneOf?
Start here for the most intimate staging in Korean pop, handled with more seriousness than the subject usually gets.
Which songs should a new listener try first?
Start with savanna, libidO, seOul drift, then continue to the official video index.