KPOP 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
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
ヒョソン효성 · HyosungView in Japanese
ソナ선화 · SunhwaView in JapaneseProfile comparison
| Members | Birth date | Blood type | MBTI | Nationality | ||
|---|---|---|---|---|---|---|
| ヒョソン | 1989-10-13 | 37 | 160cm | B | Not disclosed | South Korea |
| ハナ | 1990-02-02 | 36 | 161cm | A | Not disclosed | South Korea |
| ジウン | 1990-05-05 | 36 | 160cm | O | Not disclosed | South Korea |
| ソナ | 1990-10-06 | 36 | 165cm | B | Not disclosed | South Korea |
Ages are as of 2026-10-31.
Selected releases
04
Start here
Follow a few songs from the starting point to the group's current sound.
Secret Flavor
Shy Boy MVShy Boy is the friendliest of the singles and the clearest look at the four personalities.
Madonna MVMadonna has the strongest hook and the best of the dancing.
Poison MVPoison is the adult turn and the most controlled thing they recorded.05
From debut to now
- 2009Debut came as a four-piece, and the girl group began work under TS Entertainment.
- 2010Around Secret Time and Madonna, bouncy dance pop and hooks that stick widened recognition.
- 2011Retro and bright, Shy Boy and the softer Starlight Moonlight fixed the friendly way in.
- 2012Poison showed a stronger performance, and Talk That moved on to a wistful grown-up look.
- 2013Around Letter from Secret and Gift from Secret, the bright pop feel came forward again.
- 2014I'm In Love from Secret Summer left grown-up singing and performance as the entrance to the later years.
- 2016Sunhwa left, and the usual way of following the act shifted from the group itself toward the individual work of each member.
- 2018After 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
Achievements
Key milestones
Verified information
Verified English information is not yet available for this section.
10
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.
Trivia worth knowing
Entry point
Playing Magic, Shy Boy and Poison in that order covers the brightness, the retro turn and the grown-up phase within a few minutes.
Song
Jieun on vocals, Hyosung as the anchor on stage, Hana on raps and Sunhwa's bright expression divide the roles from song to song.
Japan activity
Japanese-language versions of Madonna and Shy Boy exist, so the Japanese releases are easier to follow apart from the Korean catalogue.
Former members
Sunhwa left in 2016, and she is listed with the former members rather than the current line-up.
Videos
As with most second-generation acts, official broadcast stages from MBC, KBS and Mnet fill in the popularity and the choreography of the time.
Streaming
Several artists share this name, so pairing a release title with the correct Apple Music artist page avoids mix-ups.
13
Japan activity score
KPOP DISCOVER original metric
No. 68/ 241 groups
No. 68 of 241 groups with recorded activity in Japan (top 28%)
- 4Japanese releases
- 16Japan-related tracks
- 0Members from Japan
- 1Official 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 2026-10-28).
How this score is calculated →View in JapaneseFrequently 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.