2nd generation · TS Entertainment
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.

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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.
ヒョソン효성 · HyosungView in Japanese
ハナ하나 · HanaView in Japanese
ジウン지은 · JieunView in Japanese
ソナ선화 · SunhwaView in Japanese| Members | Birth date | Blood type | MBTI | Nationality | ||
|---|---|---|---|---|---|---|
| ヒョソン | 1989-10-13 | 36 | 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 | 35 | 165cm | B | Not disclosed | South Korea |
Ages are as of 2026-09-17.
Follow a few songs from the starting point to the group's current sound.
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.Verified English information is not yet available for this section.
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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.
No. 65 of 210 groups with recorded activity in Japan (top 31%)
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