2nd generation · TS Entertainment

Secret

シークレット / 시크릿

Secret moved between retro brightness and grown-up dance singles, and Hyosung, Hana, Jieun and Sunhwa could carry either.

  • 2009DebutOct 13, 2009
  • 4Members
  • 2thGeneration
  • Secret TimeFandom
Shy Boy / Official MV

Last updated:

01

In 30 seconds: Secret

Shy Boy and Starlight Moonlight hold the cheerful end, Madonna and Poison the harder one, and Talk That closes the run.

Start here for a second-generation girl group that never settled on one register and was better for it.

02

Key facts

Group name
Secret
Reading / Hangul
シークレット / 시크릿
Company
TS Entertainment
Debut date
October 13, 2009
Days active
3,002 days (8 years, 2 months)
Final activity date
2018
Debut song
I Want You Back
Generation
2nd generation
Fandom name
Secret Time(シークレットタイム)
03

Member guide

Profile comparison

MembersBirth dateBlood typeMBTINationality
ヒョソン1989-10-1336160cmBNot disclosedSouth Korea
ハナ1990-02-0236161cmANot disclosedSouth Korea
ジウン1990-05-0536160cmONot disclosedSouth Korea
ソナ1990-10-0635165cmBNot disclosedSouth Korea

Ages are as of 2026-09-17.

Selected releases

04

Start here

Follow a few songs from the starting point to the group's current sound.

Secret Flavor artwork

June 18, 2026 · Full album

Secret Flavor

View the full discography →
View all official videos →
05

From debut to now

  • 2009
    Debut came as a four-piece, and the girl group began work under TS Entertainment.
  • 2010
    Around Secret Time and Madonna, bouncy dance pop and hooks that stick widened recognition.
  • 2011
    Retro and bright, Shy Boy and the softer Starlight Moonlight fixed the friendly way in.
  • 2012
    Poison showed a stronger performance, and Talk That moved on to a wistful grown-up look.
  • 2013
    Around Letter From Secret and Gift From Secret, the bright pop feel came forward again.
  • 2014
    I'm In Love from SECRET SUMMER left grown-up singing and performance as the entrance to the later years.
  • 2016
    Sunhwa left, and the usual way of following the act shifted from the group itself toward the individual work of each member.
  • 2018
    After the contract period with TS Entertainment, what remains to look back on are the main songs, the official videos and the solo work of the members.
06

Key achievements

Key milestones

2010Magic and Madonna set the signature songsThe catchy dance pop of the early years gave later listeners a set of entry songs.
2011Shy Boy widened a bright retro popShy Boy built the popular image of Secret and carries its appeal easily on the official stages.
2012Poison marked the grown-up turnPoison showed a harder face than the early brightness and became a key song for understanding the later years.

Verified information

Verified English information is not yet available for this section.

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Official links

Official site

Official social accounts and platforms

Shopping guide

Verified English shopping links are not yet available.

12

KPOP DISCOVER's Secret note

What anchors Secret is the movement between bright retro pop and a grown-up line. TS Entertainment debuted the four-piece girl group in 2009, and Hyosung, Hana, Jieun and Sunhwa worked back and forth across cheerful retro pop and grown-up dance songs.

The ways in are Shy Boy, Madonna and Poison. Shy Boy gives the friendly retro feel, Madonna confirms the strength of the hook, and Poison moves on to the grown-up look of the later years, which is enough to see the whole shape.

Following through to Starlight Moonlight, Love is Move and I'm In Love shows an act that was not simply cute but held up by singing, by expression and by the force of the choreography. Shy Boy, then Madonna, then Poison runs through the retro, the hook and the grown-up line.

Editors' take Shy Boy / Madonna / Poison — a TS four-piece whose bright retro pop and grown-up line fit into three songs.

13

Japan activity score

KPOP DISCOVER original metric
No. 65/ 210 groups

No. 65 of 210 groups with recorded activity in Japan (top 31%)

  • 4Japanese releases
  • 16Japan-related tracks
  • 0Members from Japan
  • 1Official Japanese accounts

The denominator is the 210 groups, out of 525 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 2026-09-17).

How this score is calculated →View in Japanese

Frequently asked questions

What defines Secret?
Shy Boy and Starlight Moonlight hold the cheerful end, Madonna and Poison the harder one, and Talk That closes the run.
Why should a new listener start with Secret?
Start here for a second-generation girl group that never settled on one register and was better for it.
Which songs should a new listener try first?
Start with Shy Boy, Madonna, Poison, then continue to the official video index.