Deux
One wrote the songs, and the other wore them. They were together for less than 3 years, yet that time became the place where Korean hip-hop and dance music began.
At a glance 🔭💭
Some coordinates adapted from GeoNames (CC BY 4.0) · Pleiades (CC BY 3.0)
The people beside them ⏳🌊
- InfluenceHyun Jin-young
The singer whose backup dance team, Wawa's second generation, brought the two into the entertainment world, and the owner of the album that carried Lee Hyun-do's first song as a composer.
- InfluenceKang Won-rae · Koo Jun-yup
First-generation members of Wawa; when they enlisted in the army, Kim Sung-jae and Lee Hyun-do were chosen as the second generation, and the pair later performed as Clon.
- MemberLee Hyun-do
Wrote and produced most of Deux's songs; after Kim Sung-jae's death he completed "Love, Fear," and in 2025 he led the project to bring Deux back to life through AI.
- MemberKim Sung-jae
Handled vocals and rap as well as the group's dance and style; he died at 23 in 1995, the day after his solo debut.
- InfluenceRain
In 2020, SSAK3, the trio formed with Yoo Jae-suk and Lee Hyori, remade “In Summer” as its first single, handing Deux’s summer song on to the streaming generation.
I. Two boys from Wawa · 1988–1993
(Debut) In April 1993, Deux debuted as a duo in Seoul, South Korea. The members were Kim Sung-jae and Lee Hyun-do, both born in 1972. Their first album, “DEUX,” came out on the 23rd of that month. Yet the story of the two begins some five years earlier, in a high school classroom. (Meeting) The two met through a friend toward the end of the first semester of their first year of high school. Lee Hyun-do later recalled that they recognized each other at first sight. Both are said to have been outstanding dancers even in their school days. Lee Hyun-do said he had been making music since the fourth grade, drawn to the rhythms of breakdance music before he even knew the word rap. Kim Sung-jae would later graduate from Hanyang University with a degree in tourism. Little has been made public about their families or upbringing. (Wawa) Their first step into show business was Wawa, the backup dance team for the singer Hyun Jin-young. When the first-generation members Kang Won-rae and Koo Jun-yup could no longer perform because of military enlistment, the two were chosen for the second generation. Around this time, Lee Hyun-do is said to have made his debut as a composer as well, placing “Only to You” on Hyun Jin-young’s album. The boy dancing at the back of the stage, it turns out, was already writing songs. (Independence) The two decided to form a team of their own. The name was the English-style reading of ‘deux,’ French for two. The time was just after 1992, when Seo Taiji and Boys had lifted rap and dance to the center of Korean pop. In an era when television music chart shows set the trends, two backup dancers stepped into the middle of the stage.
II. Turn Around and Look at Me · 1993
(Division of labor) The team’s roles were clear from the start. Lee Hyun-do wrote most of the songs, handled the arranging and producing, and both rapped and sang. Kim Sung-jae also sang and rapped, and he was responsible for the team’s dancing, its clothes, and its presence on stage. They were a duo that paired the one who made the songs with the one who showed those songs through the body. (New jack swing) Their first album, “DEUX,” ranged across Black music genres such as new jack swing, contemporary R&B, pop rap, and hip house. In America these styles had already defined an era, but in Korean pop they were still unfamiliar. Laying rap and singing in turn over the bouncing beats stamped out by a drum machine gave the music a texture unlike the dance pop that had come before. (Title track) The title track was “Turn Around and Look at Me.” Together with the album track “I Knew,” it made the name Deux known. Rolling Stone would later include this debut song in its list of the 100 greatest Korean pop songs. When the dancing they had honed in their Wawa days met Lee Hyun-do’s songs, what the two had to show on stage became, for the first time, wholly their own. (Emblem) The two marked the team with a logo of three circles arranged in a radial pattern, printed on their clothes. They inserted a solo dance section for each member in the middle of their performances, lending an air of improvisation. Not only the music but the clothes and the dancing became the team’s identity. It was an era when cassette tapes and CDs sold side by side and teenagers copied the outfits they saw on television stages. Deux’s fashion soon became a trend among young people.
This is the debut song the two former backup dancers released under their own name for the first time. In it, the dancing honed in their Wawa days and Lee Hyun-do’s songwriting became one for the first time.
- A drum-machine beat that pushes and pulls, as if the rhythm were lightly bouncing, drives the entire song. This beat is the heart of new jack swing (late-1980s American dance music that blended hip-hop rhythms with R&B melodies), and it is right here that the body responds first.
- Rap and singing trade places as the song moves along. The structure in which one voice rides the beat as if speaking (rap) while the other answers in melody was an unfamiliar design in Korean pop at the time.
- The early-1990s electronic sound built from drum machines and synthesizers now sounds, if anything, like a vivid texture of its era. In 2025, Lee Hyun-do was confident that this drum-centered sound would still hold up today.
- Rolling Stone included it in its list of the 100 greatest Korean pop songs, and its use as background music in the 2025 film “KPop Demon Hunters” carried it to a new generation of listeners.
III. Deuxism · 1993–1994
(Second album) On December 30, 1993, just eight months after their debut, their second album, “Deuxism,” came out. The first and second albums are said to have been distributed through the same label. The dancing grew more intense, and sampling closer to American hip-hop moved to the center of the sound. If the first album introduced the genre, the second went deeper inside it. (Rhyme) The album track “Go! Go! Go!” is regarded as a song that showed how far Korean rap could go through the craft of rhyme, the matching of like-sounding syllables. Because Korean sentences so often end in ‘-da’ (a declarative ending), end rhymes are harder to make than in English. The album was an attempt to push past that limit. “Weak Man” is also a song from this period. (The top) The title track, “We Are,” reached No. 1 on SBS’s “TV Gayo 20” in May 1994, after the turn of the year, for two straight weeks, on the 22nd and the 29th. It was the first time Deux had topped a music chart show. The second album would later be named among the 100 greatest Korean albums. (Connection) Deux’s lyrics did not stop at love songs. Taking human relationships and social phenomena as their subjects, they spoke directly to their peers. Deux’s followers were called ‘Deuxists,’ a name that outlived the breakup. Alongside Seo Taiji and Boys and the R&B group Solid, which debuted the same year, Deux stood guard at the gateway through which Black music entered mainstream Korean pop.
The title track of the second album, “Deuxism,” it gave Deux their first No. 1 on a chart show in May 1994. It clearly shows the stance of Deux’s lyrics, speaking directly to their peers.
- As the title says, it speaks in the first-person plural, ‘we.’ It reads not as a confession of love but as a call to a generation to stand together.
- In beats weightier than the first album’s and in sampling (the technique of lifting fragments of sound from existing records and using them repeatedly), you can hear the second album’s turn toward American hip-hop.
- Only when you watch it on stage, alongside the second album’s more intense choreography, does the song’s full force come through. The dance was a device for making the beat visible.
- In 2013, Geeks remade the song for a tribute project marking the 20th anniversary of Deux’s debut.
An album track from the second album, it is regarded as a song that showed how far Korean rap could go. It distills the character of “Deuxism,” an album that went deeper inside the genre.
- End rhymes, matching the sounds at the close of lines, are tightly woven throughout. It is regarded as an attempt to defy the common belief that rhyming is hard in Korean.
- Rhythm and the sound of words stand ahead of melody here, so the song grows more enjoyable when you follow the rap’s flow (the way words ride the beat).
- True to its title, a forward-driving momentum runs through the whole song, an energy that sounds like a match for the second album’s more intense dancing.
IV. In Summer · 1994
(Remix) On September 9, 1994, “RHYTHM LIGHT BEAT BLACK” came out, combining remixes of existing songs with new material. Fans call it album 2.5. Slipping a remix record between studio albums was not common in Korean pop at the time. The very idea of letting listeners hear the same song again in a different sound came from club culture. (Summer) The album’s title track is “In Summer.” Lee Hyun-do wrote both the words and the music. Though it came out in September, as summer was ending, the song went on to become the very byword for a summer song in Korea. Even now it returns every summer, on the airwaves and at vacation spots. Brighter and more melodically distinct than the songs before it, it was easy to sing along to even for those unfamiliar with the rhythms of Black music. (Media) Their popularity spread beyond the stage. In 1994, the two appeared in ads for Samsung Electronics’ CD players ‘CD OK’ and ‘Mini Mini.’ In a record market shifting from cassette to CD, the choice of Deux as the face selling the new medium shows the novelty they stood for. That same year they also appeared on KBS 2TV’s “Between Night and Music.” (Pace) In little more than a year and a half since their debut, two studio albums and a remix album had come out. Nearly every song was written by Lee Hyun-do alone. Through an unbroken run of broadcasts, events, and ad shoots, the weight piling up on the one person responsible for all the lyrics, music, and arrangements was immense. This pace would carry straight into the team’s decision the following year.
The title track of the remix album “RHYTHM LIGHT BEAT BLACK,” it came out in September yet became Korea’s signature summer song. It has the most popular melody of any Deux song.
- It is brighter and more melodically distinct than the songs before it. Its staying power lies in the refrain (chorus) anyone can sing along to, set over the rhythms of Black music.
- The speaker, caught up in the giddy mood of summer, thinks of someone and calls out to them. It is a feeling in which excitement and longing mingle.
- The light, sparkling synthesizer sounds of the mid-1990s create the summer atmosphere. It is also intriguing that the song grew out of the club-style idea of slipping a remix record between studio albums.
- It has been remade by Girl’s Day’s Sojin and the rapper Zizo, by SSAK3, and by others. SSAK3’s 2020 version, arranged by Park Moon-chi, rose near the top of the digital charts right after its release.
V. Out of the Shackles · 1995
(Force) On April 13, 1995, their third album, “Force Deux,” came out. Lee Hyun-do produced it. It moved across a wider range of styles than the earlier albums, from funk and dancehall to slow R&B (slow jams) and jazz rap. Their career was short, but it was with this album that the verdict took hold: with each album, they had come closer to the mainstream of Black music. The titles of album tracks alone, such as “Confusion of Consciousness,” “Message,” “Rumination,” and “Scars,” show their concerns widening beyond love songs. (Peak) The title track, “Out of the Shackles,” held No. 1 on SBS’s “TV Gayo 20” for four weeks in all, on June 11, 18, and 25 and again on July 16. Together with “We Are” from the second album, Deux earned six No. 1s on music chart shows. The title, a vow to break free of what binds you, is sometimes read as overlapping with the two men’s situation at the time. (Breakup) In the midst of all this, on June 7, Deux announced their breakup. The stated reason was that their grueling schedule had damaged their health. It later became known that Lee Hyun-do wanted to pursue the path of a producer, and Kim Sung-jae that of an entertainer on stage. A team at the top had chosen to stop on its own. Even as they were logging No. 1s on the chart shows, they were preparing their farewell. (Farewell) In July, the two said goodbye to their fans with a farewell concert. The performance survives as the live album “DEUX LIVE 199507151617,” titled after the concert dates. It had been two years and three months since their debut, and just three studio albums.
The title track of the third album, “Force Deux,” it gave Deux their best showing, four weeks at No. 1 in all. It was in the very period this song was topping the charts that the team announced its breakup.
- The title speaks of a will to break free of what binds. Fans sometimes read the song as overlapping with the situation of the two on the eve of their breakup.
- As befits a third album that ranged as far as funk and dancehall, the rhythm sounds heavier and the structure tighter than on the earlier albums.
- Lee Hyun-do produced the entire song. Just two years after their debut, a song written by one man stayed at the top of the chart shows for four weeks.
- It also took No. 1 on July 16, after the breakup was announced, leaving behind the memory of a team that stopped of its own accord at the top.
VI. As I Say · 1995
(Rest) After the breakup, the two are said to have gone to the United States to rest. The group had disbanded, but the bond between the two had not ended with it. Around August 1995, the record label Yedang Sound offered Kim Sung-jae a solo album, and he recorded his first album in America. Lee Hyun-do is known to have joined in preparing Kim's solo album right away and to have served as its producer. Lee later said he had meant for them to go their separate ways for a while and then come back together. (Debut) In November 1995, Kim Sung-jae's solo song “As I Say” came out. It was the first song in which he, who had handled the dancing and the style in the Deux years, stood alone at center stage. On November 19, he gave its first performance on SBS's live “TV Gayo 20.” That performance became his last. (Loss) The next day, November 20, Kim Sung-jae was found dead in a hotel in Hongeun-dong, Seodaemun-gu, Seoul. He was 23. The questions surrounding his death were never officially resolved, and the case remains unsolved. After he was gone, “As I Say” was twice nominated for first place on KBS's “Gayo Top 10.” (Silence) After Kim Sung-jae's death, Lee Hyun-do announced his retirement. Long afterward he still called it unjust and stifling, something he would carry for the rest of his life. Yet he asked that Kim be remembered not in a dark light but as he was at his best. He also said he regretted that they had not shared more drinks together. In a group where one wrote the songs and the other wore them, only the one who wrote them remained.
VII. The voice that remains · 1996–2026
(Return) In 1996, Lee Hyun-do returned with a solo album under the name D.O. On March 1, 1997, the two-disc best-of album “DEUX FOREVER,” regarded as Deux's final album, was released. It included the unreleased song “Love, Fear,” completed by adding Lee's newly recorded voice to a vocal Kim Sung-jae had recorded while alive. Part of the proceeds went to Kim's family. (Lineage) Lee Hyun-do went on to work as a producer and label head. His solo album “The New Classik... And You Don't Stop” includes “Sudden Shower,” featuring Cho PD. In 2013 he led the D.O Crew on Mnet's “Show Me the Money 2.” That same year a tribute project marked the duo's twentieth debut anniversary: Sojin of Girl's Day and the rapper Jijo sang “In Summer” anew, and Geeks remade “We Are.” Many younger artists are counted among those Deux influenced. (Summer) In the summer of 2020, SSAK3 — formed by Yoo Jae-suk·Lee Hyori·Rain — remade “In Summer” as their first song. Park Moon-chi arranged it, and the track climbed to the top of the streaming charts right after release. Listeners of the streaming age heard a summer song from twenty-six years earlier as if it were new. (Revival) In 2025, “Look Back at Me” was used in the soundtrack of the Netflix animated film “KPop Demon Hunters.” That same year Lee Hyun-do founded Wide Company and announced that, with the consent of Kim's family, he would make a fourth Deux album with Kim Sung-jae's voice restored by AI. The new song “Rise” was released on November 27, and the ballad “Another Day” on April 18, 2026. A duo halted thirty years earlier became two again with the help of technology.
A song completed by Lee Hyun-do adding his voice to a recording Kim Sung-jae had begun and left unfinished in his lifetime. Included on “DEUX FOREVER” in 1997, it became the last duet made by the one who stayed with the one who left.
- Kim Sung-jae was recording it as a solo song when vocal cord nodules cut the session short; it was later slated to be the title track of Deux's fourth album. Knowing it is an unfinished recording, you hear the grain of the voice differently.
- Two voices recorded at different times meet within a single song. It is worth listening for how the recording made in his lifetime and the one added later fit together.
- Like the two words of its title, it holds the opposing feelings of love and fear together. The mood is closer to hesitation than to confession.
- Part of the proceeds from the album that carried the song went to Kim Sung-jae's family.
Lesser-known stories
The name Deux was not chosen by the members themselves. Shin Seung-ri, daughter of the film director Shin Sang-ok, suggested the French word “deux,” meaning two. But instead of the French pronunciation, an English-style reading, “dyuseu,” stuck as the group's name. How this name — spelled in French, read the English way — came to be fixed remains a story passed around mostly among fans. Around the time the group formed, there was also a plan to add a female member. When Miae (real name Kim Mi-ae), who was mentioned as a candidate, declined, Deux remained a duo to the end. As it turned out, it was this choice that made a name meaning “two” the right one. The list regarded as Deux's official discography leaves out “DEUX BEST,” released in 1996. Because it came out without Lee Hyun-do's consent, he and the fans do not recognize it as an official album. It is a glimpse of the 1990s record industry, when, right after the breakup and Kim Sung-jae's death, the group's music was put back on the market regardless of its members' wishes. “Love, Fear” has a longer story. It began as a solo recording by Kim Sung-jae, but the session stopped when he developed vocal cord nodules. It is said that afterward it was set to be the title track of Deux's fourth album. In the end the fourth album never came out, and Lee Hyun-do completed the song by adding his own voice to the recording Kim had left behind. When Lee set out, nearly thirty years later, to make a fourth Deux album after all, he was also picking up a plan that had stood still for that long. “Another Day,” released on April 18, 2026, came out on Kim Sung-jae's birthday.
Glossary 📚🔎
New jack swing
(Meaning) From the English “new jack swing.” In American slang a “new jack” is a newcomer, and “swing” is the feel of a beat that pushes and pulls slightly, swaying like a swing. (In Korean pop) Dance music created in America in the late 1980s by blending the hard drum beats of hip-hop with the smooth singing of R&B. In Korea, singers such as Deux and Hyun Jin-young brought this sound into mainstream pop in the early 1990s. Think of jumping rope. If instead of jumping at a steady pace you jump long, then short, off the beat, your body starts bouncing on its own. The new jack swing beat carries exactly that kind of offbeat sway.
Backup dancer
(Meaning) In English, to “back up” means to support from behind. It refers to someone who supports the stage with dance behind a singer. (In Korean pop) A dancer who shapes the stage by dancing behind or beside a singer while they sing. In the 1990s, it was common for former backup dancers to form their own groups and debut as singers. Deux and Clon, both from Wawa, are the prime examples. Picture the chorus or dance troupe standing behind the lead in a school play. It is as if the kids who stood out most in that troupe were cast as the leads in the next year's play.
Remix
(Meaning) A word combining the English “re” (again) and “mix,” meaning to mix again. (In Korean pop) Taking the vocals and instrument tracks of an already released song apart and changing the beat or arrangement to make a new version. Deux's “RHYTHM LIGHT BEAT BLACK” is called album 2.5 because it gathers such remixes together with new songs. It is like taking the fillings for gimbap and reshaping them into rice balls. The ingredients are the same, but the shape and the way it eats are different. (Elsewhere) These days, taking someone else's video or artwork and re-editing it is also called a remix.
Sampling
(Meaning) The English “sample” means a specimen or swatch. It refers to lifting a fragment of sound from another record, like a swatch. (In Korean pop) A core hip-hop technique in which a drum hit, a bar of an instrument, or a snippet of voice is cut from an existing record and looped or altered to serve as material for a new song. On their second album, Deux made full use of sampling in a way close to American hip-hop. It is like a collage assignment where you cut out magazine photos and paste them into a new picture. The cut pieces may belong to someone else, but the finished picture is a new work. (Elsewhere) In statistics and science, sampling means selecting part of a whole to study.
Rhyme
(Meaning) The English “rhyme” refers to matching the sounds at the ends of lines in poetry — what Korean calls un (韻), 'rhyme.' (In Korean pop) The craft of deliberately repeating similar-sounding syllables at the ends of or within lines of a rap so they stick in the ear. It was often said that rhyming is hard in Korean because so many sentences end in “-da.” Deux's “Go! Go! Go!” is credited as a song that tried to push past this limit. It helps to think of it as the reverse of a word-chain game. In a word chain, each word starts with the last sound of the one before, but a rhyme makes the final sounds of several lines match.
Music chart shows
(In Korean pop) Television programs that rank the week's popular songs by measures such as album sales, airplay, and viewer votes, and give a trophy to the number-one artist. In the 1990s, when Deux was active, KBS's “Gayo Top 10” and SBS's “TV Gayo 20” set the trends. Deux took first place six times in all: twice with “We Are” and four times with “Breaking Free.” It is like posting a standings chart every week during an interclass dodgeball tournament. The class at the top of that chart gets the most attention that week.
Tribute album
(Meaning) The word heonjeong (獻呈), 'tribute,' is written with 獻 (heon, 'to offer up') and 呈 (jeong, 'to present'), meaning to offer something up as a mark of respect. (In Korean pop) An album or project in which younger musicians rearrange and perform the songs of a senior artist they admire. For Deux's twentieth debut anniversary in 2013, several producers took part in remaking “In Summer,” “We Are,” and “Go Away.” It is like classmates binding the letters each of them wrote into a single book for a departing teacher. Each wrote in their own way, but the feelings all point toward one person.