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
Two years to complete the workbook: S1 on 1 May 2022, S24 on 4 April 2024. In between — DIMENSIONs, Gravities, SIGNAL, albums, HAUS. Filter by year or kind. Video stills open the official @triplescosmos upload.
59 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
S01SeoYeon윤서연First member. 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
S02HyeRin정혜린Second SIGNAL. A dancer from Daegu. Teaser: JeongHyeRin.SSS.
Watch on official YouTubeReveal
S3 Lee JiWoo
S3 이지우
S03JiWoo이지우Main vocalist from Seoul. Teaser: LeeJiWoo.SSS.
Watch on official YouTubeReveal
S4 Kim ChaeYeon
S4 김채연
S04ChaeYeon김채연Former Busters member. Teaser: KimChaeYeon.SSS.
Watch on official YouTubeReveal
S5 Kim YooYeon
S5 김유연
S05YooYeon김유연Eldest member. 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 is revealed the same day. Teaser: KimSooMin.SSS.
Watch on official YouTubeReveal
S7 Kim NaKyoung
S7 김나경
S07NaKyoung김나경All-rounder from Ulsan. Teaser: KimNaKyoung.SSS.
Watch on official YouTubeReveal
S8 Gong YuBin
S8 공유빈
S08YuBin공유빈The original eight is complete. 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
S09Kaede카에데First Japanese member. Teaser: Kaede.SSS.
Watch on official YouTubeReveal
S10 Seo DaHyun
S10 서다현
S10DaHyun서다현Closes the first ten. Later Aria’s leader. Teaser: SeoDaHyun.SSS.
Watch on official YouTubeReveal
S11 Kamimoto Kotone
S11 코토네
S11Kotone코토네Second Japanese member. Binary01 begins. Teaser: Kotone.SSS.
Watch on official YouTubeReveal
S12 Kwak YeonJi
S12 곽연지
S12YeonJi곽연지Revealed 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. 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. 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
S16Mayu마유Completes 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
S17Lynn린NXT begins. Four members, four days, no Gravity. Teaser: Lynn.SSS.
Watch on official YouTubeReveal
S18 JooBin
S18 주빈
S18JooBin주빈Second of the NXT four. Teaser: JooBin.SSS.
Watch on official YouTubeDimension
S19 Jeong HaYeon · NXT Just Do It
S19 정하연 · NXT Just Do It
S19HaYeon정하연HaYeon revealed the same day NXT drops Just Do It. Four new members, one week.
Watch on official YouTubeReveal
S20 Park ShiOn
S20 박시온
S20ShiOn박시온Closes 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
S21ChaeWon김채원Glow begins. Last four, four consecutive days. Teaser: KimChaeWon.SSS.
Watch on official YouTubeReveal
S22 Sullin
S22 설린
S22Sullin설린First Thai member. Later Moon’s captain. Teaser: Sullin.SSS.
Watch on official YouTubeReveal
S23 SeoAh
S23 서아
S23SeoAh서아Maknae. 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. 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
First OT24 fan concert in Seoul.
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.
Japan
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.
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: pick the episode’s most valuable player. Result waits on official COSMO / @triplescosmos — this archive does not guess.
