Company
MODHAUS founded
모드하우스 설립
Jaden Jeong (정병기) and Joseph Baek incorporate a social-entertainment label in Seoul. The company will later build tripleS as a 24-member DIMENSION system.
FROM THESIS TO LOVE&POP
Timeline
78 events
Company
Fan-participating girl group announced
팬 참여형 걸그룹 발표
MODHAUS announces a girl group that fans will help configure. Lineups and title tracks will later be decided through Gravity on the COSMO app.
Signal
thesis
thesis
First upload on the official YouTube channel: tripleS 트리플에스 : thesis. The project has a name.
Watch on official YouTubeSignal
we are S
we are S
Official teaser we are S. The copy already says twenty-four. The roster does not exist yet.
Watch on official YouTubeReveal
S1 Yoon SeoYeon
S1 윤서연
S1SeoYeon윤서연First member. A Daejeon vocalist. Official anniversary date of tripleS. Teaser: YoonSeoYeon.SSS.
Watch on official YouTubeHaus
Introducing Our Haus
하우스를 소개합니다
SIGNAL 220509. The dorm is on camera. For many WAVs this is the first time the 24-member idea feels like a house, not a teaser schedule.
Watch on official YouTubeReveal
S2 Jeong HyeRin
S2 정혜린
S2HyeRin정혜린Second SIGNAL. A dancer from Daegu, child-actress posture into idol tempo. Teaser: JeongHyeRin.SSS.
Watch on official YouTubeReveal
S3 Lee JiWoo
S3 이지우
S3JiWoo이지우Main vocalist from Seoul. High-note pillar, lemon in front of SM/JYP/YG hallways. Teaser: LeeJiWoo.SSS.
Watch on official YouTubeReveal
S4 Kim ChaeYeon
S4 김채연
S4ChaeYeon김채연Former Busters member from Seoul. Camera-fluent before the HAUS. Teaser: KimChaeYeon.SSS.
Watch on official YouTubeReveal
S5 Kim YooYeon
S5 김유연
S5YooYeon김유연Eldest member, from Seoul. Later the first DIMENSION captain. Teaser: KimYooYeon.SSS.
Watch on official YouTubeReveal
COSMO launches · S6 Kim SooMin
COSMO 오픈 · S6 김수민
COSMO: the gate opens. Objekts, COMO, Gravity. S6 Kim SooMin from Daegu is revealed the same day. Teaser: KimSooMin.SSS.
Watch on official YouTubeReveal
S7 Kim NaKyoung
S7 김나경
S7NaKyoung김나경All-rounder from Ulsan. Teaser: KimNaKyoung.SSS.
Watch on official YouTubeReveal
S8 Gong YuBin
S8 공유빈
S8YuBin공유빈Dancer from Yongin. Completes the original eight. Teaser: GongYuBin.SSS.
Watch on official YouTubeGravity
First Grand Gravity
첫 그랜드 그래비티
WAV split S1–S8 into two fours. Result: Acid Angel from Asia and +(KR)ystal Eyes. Public Gravity record — votes ran inside the official COSMO app.
Dimension
Acid Angel from Asia — ACCESS
Acid Angel from Asia — ACCESS
First DIMENSION debuts with Generation. YooYeon, HyeRin, NaKyoung, YuBin. The group exists as music, not just a teaser calendar.
Watch on official YouTubeReveal
S9 Yamada Kaede
S9 카에데
S9Kaede카에데First Japanese member, from Toyama. Teaser: Kaede.SSS.
Watch on official YouTubeReveal
S10 Seo DaHyun
S10 서다현
S10DaHyun서다현Busan vocalist. Closes the first ten. Later Aria’s leader. Teaser: SeoDaHyun.SSS.
Watch on official YouTubeReveal
S11 Kamimoto Kotone
S11 코토네
S11Kotone코토네Second Japanese member, from Tokyo. Binary01 begins. Teaser: Kotone.SSS.
Watch on official YouTubeReveal
S12 Kwak YeonJi
S12 곽연지
S12YeonJi곽연지From Gwangju, Gyeonggi — not the metro city. Revealed two weeks after Kotone, just before the 10-member debut. Teaser: KwakYeonJi.SSS.
Watch on official YouTubeMusic
ASSEMBLE — Rising
ASSEMBLE — Rising
S1–S10 debut as tripleS. Title track Rising was chosen from demo candidates in COSMO Hub. Kotone and YeonJi are already revealed but not on this record.
Watch on official YouTubeReveal
S13 Hsu Nien
S13 니엔
S13Nien니엔Taiwanese member, born New Taipei City. Official teaser: Nien.SSS.
Watch on official YouTubeGravity
Fandom name Gravity — WAV
팬덤명 그래비티 — WAV
Event Gravity names the fandom WAV (웨이브). Public result; voting happened in COSMO.
Reveal
S14 Park SoHyun
S14 박소현
S14SoHyun박소현Producer in the idol, from Songpa. KOMCA-registered. Teaser: ParkSoHyun.SSS.
Watch on official YouTubeGravity
Two Big WAVes Gravity
투 빅 웨이브 그래비티
WAV vote two eights from the first 14, to be completed by S15 and S16: LOVElution and EVOLution.
Dimension
+(KR)ystal Eyes — Aesthetic
+(KR)ystal Eyes — Aesthetic
SeoYeon, JiWoo, ChaeYeon, SooMin. Cherry Talk. The crystal counterpart to Acid Angel.
Watch on official YouTubeReveal
S15 Zhou Xinyu
S15 신위
S15Xinyu신위Tallest member, from Beijing. Completes LOVElution. Teaser: Xinyu.SSS.
Watch on official YouTubeMusic
ACID EYES — Cherry Gene
ACID EYES — Cherry Gene
AAA × KRE as a single eight. First collision of two DIMENSIONs on one record.
Reveal
S16 Kōma Mayu
S16 마유
S16Mayu마유From Gunma. Completes EVOLution. Later ∞! leader. Teaser: Mayu.SSS.
Watch on official YouTubeDimension
LOVElution — ↀ MUHAN
LOVElution — ↀ MUHAN
Girls' Capitalism. SeoYeon captains the love-side eight. Authentic US tour follows.
Dimension
EVOLution — ⟡ MUJUK
EVOLution — ⟡ MUJUK
Invincible. YooYeon captains the evol-side eight. Authentic Australia follows.
Award
MAMA Best New Female Artist
MAMA 여자 신인상
First major ceremony trophy. Brand of the Year rookie idol the same season.
Reveal
S17 Kawakami Lynn
S17 린
S17Lynn린Tokyo-born dancer. NXT begins — four members, four days, no Gravity. Teaser: Lynn.SSS.
Watch on official YouTubeReveal
S18 JooBin
S18 주빈
S18JooBin주빈Second of the NXT four, from Siheung. Teaser: JooBin.SSS.
Watch on official YouTubeDimension
S19 Jeong HaYeon · NXT Just Do It
S19 정하연 · NXT Just Do It
S19HaYeon정하연HaYeon from Anyang revealed the same day NXT drops Just Do It. Four new members, one week.
Watch on official YouTubeReveal
S20 Park ShiOn
S20 박시온
S20ShiOn박시온From Daejeon, like SeoYeon. Closes the first twenty on Christmas Eve. Later pre-selected for ∞!. Teaser: ParkShiOn.SSS.
Watch on official YouTubeDimension
Aria — Structure of Sadness
Aria — Structure of Sadness
First ballad DIMENSION. DaHyun leads five voices. Title video: Door.
Watch on official YouTubeConcert
Authentic in Seoul
Authentic in Seoul
Night one: LOVElution and EVOLution. Night two: twenty revealed members. ASSEMBLE24 is announced from the stage.
Reveal
S21 Kim ChaeWon
S21 김채원
S21ChaeWon김채원Incheon vocalist. Glow begins. Last four, four consecutive days. Teaser: KimChaeWon.SSS.
Watch on official YouTubeReveal
S22 Sullin
S22 설린
S22Sullin설린First Thai member, from Kanchanaburi / Bangkok. Later Moon’s captain. Teaser: Sullin.SSS.
Watch on official YouTubeReveal
S23 SeoAh
S23 서아
S23SeoAh서아Maknae, born 2010. Legal name Jeong Hae-rin — stage name later chosen by Gravity so it does not collide with S2. Teaser: SeoAh.SSS.
Watch on official YouTubeReveal
S24 JiYeon — OT24 complete
S24 지연 — OT24 완성
S24JiYeon지연Final member, from Yongin. Two years after S1. Stage name chosen by Gravity. The S-numbers are full.
Watch on official YouTubeMusic
ASSEMBLE24 — Girls Never Die
ASSEMBLE24 — Girls Never Die
First OT24 studio album. 211,000+ copies. The title becomes a WAV thesis statement.
Watch on official YouTubeDimension
Glow — Inner Dance
Glow — Inner Dance
S21–S24 first statement. ChaeWon, Sullin, SeoAh, JiYeon.
Concert
Girls Never Stop
Girls Never Stop
6–7 July 2024 in Seoul. First OT24 fan concert after Girls Never Die.
Japan
### (hash) Japan pre-debut
### 일본 프리데뷔
Digital single read as ‘hash’. The Japan DIMENSION is coming.
Gravity
Japan Dimension Grand Gravity
일본 디멘션 그랜드 그래비티
Mayu and ShiOn pre-selected. WAV fills the other six. 968,420 COMO. Result: ∞! (Hatchi).
Dimension
Visionary Vision — Performante
Visionary Vision — Performante
12-member dance album. Hit The Floor. HyeRin captains. Two studio albums in one calendar year.
Watch on official YouTubeJapan
∞! Japanese debut — Untitled
∞! 일본 데뷔 — Untitled
SME Records. Hatchi is 8: JiWoo, ChaeYeon, YooYeon, SooMin, Kotone, Mayu, ShiOn, ChaeWon.
Watch on official YouTubeGravity
ASSEMBLE25 title Gravity
ASSEMBLE25 타이틀 그래비티
OT24 title-track vote. Result: 깨어 (Are You Alive). 583,228 COMO.
Music
ASSEMBLE25 — 깨어
ASSEMBLE25 — 깨어
Are You Alive. 407,000+ copies. Year-two OT24 studio album.
Watch on official YouTubeGravity
msnz Grand Gravity
msnz 그랜드 그래비티
Four universe DIMENSIONs — Moon, Sun, Neptune, Zenith — members and songs. Umbrella name Magic Shine New Zone.
Japan
∞! SecretHimitsuBimil — Password
∞! SecretHimitsuBimil — Password
Hatchi first comeback. Password pre-released 17 September.
Watch on official YouTubeDimension
msnz — Beyond Beauty
msnz — Beyond Beauty
Moon, Sun, Neptune, Zenith drop together. Cameo Love, Bubble Gum Girl, Fly Up, Q&A. One night, four planets.
Watch on official YouTubeMusic
LOVE&POP pt.1 — Baby Flower
LOVE&POP pt.1 — Baby Flower
ASSEMBLE26 opens. Three parts: Korean love, Korean pop, Japanese 2027.
Watch on official YouTubeGravity
Badge War 4 theme Gravity
배지전쟁 4 주제곡 그래비티
Event Gravity for Strong Girl: Badge War Season 4 theme. Result: World Wild Women. Watch the official YouTube commentary — this archive does not link broadcast networks.
Watch on official YouTubeConcert
ANDLESS world-tour dates
ANDLESS 월드투어 일정
Official @triplescosmos posts the map: Seoul Jangchung Arena 10–11 Oct, Macau 24 Oct, Tokyo 31 Oct, then Toronto, New York, Chicago, Dallas, Los Angeles, Vancouver in November. Taipei 18 Oct sits on the official Linktree. (North America dates and the Fort Worth venue were later updated 21 Sep 2026.)
Signal
의적단 Season 3 EP.1 — SooMin & NaKyoung
의적단 시즌3 EP.1 — 수민·나경
S6 and S7 as maknae MCs on the 의적단 channel. Official @triplescosmos posted the episode. Not a tripleS DIMENSION.
Watch on official YouTubeJapan
sun — DNA (Dream N Access)
썬 — DNA (Dream N Access)
Sun DIMENSION Japanese original. Second of four monthly msnz JP singles toward a January 2027 album. Connection as a theme: running toward an unknown world on someone else’s signal.
Signal
[tripleS’ Sleeping Mozzarella] Teaser
[tripleS의 잠을 모짜렐라] 티저
Kolmar girls-night teaser posted by official @triplescosmos. Chat until midnight. EP.1 4 Sep, EP.2 18 Sep.
![[tripleS’ Sleeping Mozzarella] Teaser official YouTube still](https://i.ytimg.com/vi/TacxhOb6M98/mqdefault.jpg)
Watch on official YouTubeSignal
ChaeYeon YouTube OPEN — 13년 차 신인 김채연
채연 유튜브 OPEN — 13년 차 신인 김채연
Official @triplescosmos: S4 personal channel @S4KimChaeYeon. First video 10 Sep with Kian84. Outbound only.
Concert
HyeRin and SooMin at Lions Park
혜린·수민, 라이온즈 파크
Ceremonial first pitch and first hit at Samsung Lions Park. Official @triplescosmos, 8 Sep 2026.
Gravity
Badge War 4 EP.4 MVP Gravity
배지전쟁4 EP.4 MVP 그래비티
Event Gravity on COSMO, 12 Sep 10:00–14 Sep 10:00 KST. Official result is on COSMO / X. Watch EP.4 zenith commentary, then open results on the Badge War page.
Watch on official YouTubeConcert
Xinyu not attending ANDLESS Taipei
신위, ANDLESS 타이베이 불참
Official COSMO / @triplescosmos. Taipei 18 Oct only. Other ANDLESS dates unchanged. This archive does not add a reason the company did not publish.
Signal
Samsung Lions SIGNAL — HyeRin & SooMin
삼성 라이온즈 SIGNAL — 혜린·수민
사자와 승요 대구즈의 만남. First pitch and first hit at Lions Park. Official SIGNAL 260918.
Watch on official YouTubeAward
2026 THE FACT MUSIC AWARDS — Busan
2026 더팩트 뮤직 어워즈 — 부산
Busan Asiad Main Stadium. Red carpet 16:00, ceremony 18:00 KST. Twelve members: HyeRin, JiWoo, ChaeYeon, NaKyoung, DaHyun, YeonJi, Nien, SoHyun, ShiOn, HaYeon, Sullin, JiYeon.
Gravity
Visual Director Gravity — SoHyun, vintage wedding
비주얼 디렉터 그래비티 — 소현, 빈티지 웨딩
Event Gravity final result: SoHyun — vintage wedding. Official @triplescosmos.
Concert
ANDLESS North America dates updated
ANDLESS 북미 일정 수정
Official @triplescosmos: New York 15 Nov, Fort Worth 21 Nov (Will Rogers), Los Angeles 24 Nov, Vancouver 26 Nov. Artist presale 24 Sep.
Signal
Badge War 4 behind — SIGNAL 260921
배지전쟁4 비하인드 — SIGNAL 260921
Official SIGNAL 260921 on @triplescosmos. Badge War 4 behind.
Watch on official YouTubeGravity
Winter Cover Unit Gravity
윈터 커버 유닛 그래비티
Event Gravity opened 22 Sep 11:00 KST and closed 23 Sep 09:00. The next day's official result is Team Blue C — sun and neptune. The cover, posted 24 Sep, is Merry & Happy.
Watch on official YouTubeSignal
S7 NaKyoung — SecretBase season 2
S7 나경 — SecretBase 시즌2
S7NaKyoung김나경Official @triplescosmos YouTube. S7 NaKyoung | SecretBase season2.
Watch on official YouTubeGravity
Winter Cover Unit — Team Blue C
윈터 커버 유닛 — Team Blue C
Official @triplescosmos final result: Team Blue C — sun and neptune.
Gravity
Winter cover song — Merry & Happy
윈터 커버곡 — Merry & Happy
Official @triplescosmos, 13:00 KST. Cover for Team Blue C (sun and neptune): Merry & Happy (TWICE).
Company
Cream02 3rd Objekt — Day 2
Cream02 3rd 오브젝트 — Day 2
Official @triplescosmos. First Class 10:00–26 Sep 11:30 KST. Motion Class 10:15–26 Sep 11:45 KST.
Gravity
ANDLESS Seoul opening outfit vote
ANDLESS 서울 오프닝 의상 투표
Event Gravity 24 Sep 20:00–25 Sep 20:00 KST. Official 12:00 snapshot, not the final result. Ballot: Evangelion, Sailor Moon, Battle Royale, Cardcaptor Cherry, Marine, Balletcore.
Broadcast
YooYeon on SBS Power FM
유연 — SBS 파워FM 배성재의 텐
Official @triplescosmos. YooYeon on 배성재의 텐 at 20:30 KST.
Broadcast
YooYeon, SooMin, DaHyun on SBS Power FM
유연·수민·다현 — SBS 파워FM
Official @triplescosmos. The three on 배성재의 텐 at 22:00 KST.
Signal
SIGNAL 260930 — badge war is not over
SIGNAL 260930 — 끝나지 않은 배지전쟁
Official SIGNAL 260930. 끝나지 않은 배지전쟁 이야기.
Watch on official YouTubeBroadcast
YooYeon on SBS Power FM
유연 — SBS 파워FM 배성재의 텐
Official @triplescosmos. YooYeon on 배성재의 텐 at 22:00 KST.
