DaHyun서다현

Before MODHAUS

Former Source Music trainee. Appeared on tvN Sixth Sense (2021).

Notes

• Last of the original ASSEMBLE (S1–S10) reveal wave.
• Leader of Aria, the ballad DIMENSION.
• Former Source Music trainee.
• Shares a January 8 birthday with YeonJi (different year).
• Winter cover, Team Blue C — sun and neptune. Song: Merry & Happy. Official 24 Sep 2026.
• Neptune member under SeoYeon.
• Door is Aria's title made visible.
• Last reveal before the 10-member debut era closed.
• INFJ — the quietest captain on paper, not on a mic.

How she was batched

• Two Big WAVes

  LOVE spelled backwards is EVOL.

  Universe 2 split the growing roster into a love-side eight and a harder eight. SeoYeon kept the captaincy through MUHAN and the Authentic US tour. YooYeon took EVOL through MUJUK and Australia. Girls’ Capitalism vs Invincible is not a rivalry chart — it is a palindrome. The content team ran two touring DIMENSIONs at once: two HAUS temperatures, two title-track bodies, one fandom name. That is the first time 24 started to feel like a system instead of a countdown.

• Aria · Visionary Vision

  Five voices, then a twelve-body army.

  Aria proved 24 can go quiet: DaHyun leading a ballad five through Structure of Sadness. Visionary Vision proved the other pole — HyeRin captaining a 12-member dance DIMENSION through Performante, with YuBin and Lynn pre-selected and Gravity filling the rest. The system’s personality is this stretch: from Door to Hit The Floor without changing the clock.

• msnz · four planets

  Moon, Sun, Neptune, Zenith — six each.

  WAV named the 2025 OT24 umbrella Magic Shine New Zone, then the roster split into four 6-member planets on one record, Beyond Beauty. Sullin’s Moon, Xinyu’s Sun (Bubble Gum Girl), SeoYeon’s Neptune, HaYeon’s Zenith. Team dynamic: four captains, four temperatures, monthly Japanese originals toward 2027. Sun is the aero-pop flag this archive had been skipping; the other three planets are the rest of the sky.

Group albums she stood on

• 2023-02-13 · Mini album · KR

  ASSEMBLE

  tripleS (S1–S10) · Rising

  Ten-member debut. Rising chosen from COSMO Hub. Circle #6, ~55k. Official MV on @triplescosmos.

  1. 01Beam
  2. 02Before the Rise
  3. 03RisingTitle · Gravity
  4. 04ColorfulPromoted b-side
  5. 05The Baddest
  6. 06New Look
  7. 07초월 (Chowall)

• 2024-05-08 · Studio album · KR

  ASSEMBLE24

  tripleS · Girls Never Die

  OT24 first studio album. Circle #3, 211k+. Official MV on @triplescosmos.

  1. 01S
  2. 02Girls Never DieTitle
  3. 03가시권 (Heart Raider)
  4. 04Midnight Flower
  5. 05White Soul Sneakers
  6. 06치유 (Chiyu)
  7. 0724
  8. 08이면의 이면 (Beyond the Beyond)
  9. 09Non Scale
  10. 10Dimension

• 2024-07-20 · Digital single · JP

  ###

  tripleS · ###

  Japan pre-debut single. Read ‘hash’. First SME-facing stamp before Untitled.

  1. 01###Title · read ‘hash’

• 2025-04-12 · Digital single · JP

  Girls Never Die (Japanese Ver.)

  tripleS · Girls Never Die (Japanese Ver.)

  Japanese version of the ASSEMBLE24 title. Later collected on SecretHimitsuBimil CD.

  1. 01Girls Never Die (Japanese Ver.)Title

• 2025-05-12 · Studio album · KR

  ASSEMBLE25

  tripleS · 깨어 (Are You Alive)

  OT24 year-two. Circle #3, 461k, KMCA Platinum. Title by Gravity. Persona and Diablo with Park SoHyun.

  1. 01@% (Alpha Percent)
  2. 02깨어 (Are You Alive)Title · Gravity
  3. 03추리소설 (Detective Soseol)Promoted b-side
  4. 04어제 우리 불꽃놀이 (Firework Diary)
  5. 05Love Child
  6. 06PersonaPark SoHyun
  7. 07Too Hot
  8. 08DiabloPark SoHyun
  9. 09Friend Zone
  10. 10Love2Love

• 2026-06-01 · Mini album · KR

  ASSEMBLE26 <LOVE&POP> pt.1

  tripleS · Baby Flower

  First of three LOVE&POP parts. Circle #2, 518k, KMCA Platinum. Official MV on @triplescosmos. Pt.2 is 16 Oct 2026, 13:00 KST. Pt.3 January 2027.

  1. 01Sad Girls Schemin'
  2. 02Peer
  3. 03Baby FlowerTitle
  4. 04Type of Girl
  5. 05Sleek
  6. 06I Like That
  7. 07Me Myself Mode

• 2026-06-03 · Digital single · JP

  Baby Flower (Japanese Ver.)

  tripleS · Baby Flower (Japanese Ver.)

  Japanese version of the LOVE&POP pt.1 title. Official audio on @triplescosmos.

  1. 01Baby Flower (Japanese Ver.)Title

Her clock

1. Fri 9 Dec 2022 · Reveal

   S10 Seo DaHyun

   Busan vocalist. Closes the first ten. Later Aria’s leader. Teaser: SeoDaHyun.SSS.

2. Mon 13 Feb 2023 · Music

   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.

3. Mon 15 Jan 2024 · Dimension

   Aria — Structure of Sadness

   First ballad DIMENSION. DaHyun leads five voices. Title video: Door.

4. Sat 19 Sep 2026 · Award

   2026 THE FACT MUSIC AWARDS — Busan

   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.

5. Tue 29 Sep 2026 · Broadcast

   YooYeon, SooMin, DaHyun on SBS Power FM

   Official @triplescosmos. The three on 배성재의 텐 at 22:00 KST.

Tours & rooms she walked

• Sep–Oct 2023 · United States · Tour

  Authentic — LOVElution

  First overseas tour, September–October 2023. LOVElution carried the Authentic United States leg. It is the first of three Authentic runs: this US leg, Australia with EVOLution on 20–23 December 2023, then Seoul on 3–4 February 2024. This page is the archive note for the US leg only. Cities inside the country are not listed here, and this archive does not sell tickets.

• 20–23 Dec 2023 · Australia · Tour

  Authentic — EVOLution

  20–23 December 2023 in Australia. EVOLution took the second Authentic leg, after LOVElution’s United States run in September–October 2023 and before Authentic in Seoul on 3–4 February 2024. This page records that Australia leg. It does not sell tickets.

• 3–4 Feb 2024 · Seoul · Concert

  Authentic in Seoul

  3–4 February 2024 in Seoul, the last Authentic run. Night one was LOVElution and EVOLution. Night two was all 20 members revealed by then. ASSEMBLE24 was announced from that stage. The US leg was September–October 2023 and the Australia leg was 20–23 December 2023. This archive does not sell tickets.

• 2026 · Asia · Asia tour

  My Secret New Zone

  First Asia tour under the msnz banner, 2026. Performance Gravity chose each unit’s songs. msnz is the OT24 umbrella that split into Moon, Sun, Neptune, and Zenith. This page is the tour note, separate from the dimension page and from ANDLESS. This archive does not sell tickets.

Same orbit

• S12YeonJisame date
• S1SeoYeonplanet
• S7NaKyoungplanet
• S13Nienplanet
• S11Kotoneplanet
• S23SeoAhplanet