SIDEWALKCLUB Members Profile 2026: Bio, Ages, Height & Interesting Facts
SIDEWALKCLUB is a newly announced three-member South Korean boy group under Orca Music, consisting of former BAE173 members Hyunwoo, Junseo and Youngseo. The group name and official social-media channels were revealed on September 14, 2026. Orca Music had announced four days earlier that the three singers had signed exclusive contracts with the company and would reveal a new team name in mid-September before moving into album preparation.
SIDEWALKCLUB is a new three-member South Korean boy group under Orca Music, featuring Hyunwoo, Junseo and Youngseo. All three members previously promoted as members of BAE173, making the new project a significant next step in their careers after their PocketDol Studio contracts ended in June 2026.
Orca Music announced the three members’ exclusive contracts on September 4, 2026. The company said they were preparing new music and performances and planned to reveal their new team name in mid-September. That reveal arrived on September 14, when SIDEWALKCLUB officially introduced itself and opened group social-media accounts.
The group has not debuted yet. As of September 14, there is no officially announced debut date, debut single or album release schedule. Orca Music has confirmed that album preparation is underway, which makes the project active but still firmly in its pre-debut stage.
Quick Overview
| Category | Verified Information |
|---|---|
| Group | SIDEWALKCLUB |
| Korean name | Not independently confirmed |
| Group type | Boy group |
| Members | Hyunwoo, Junseo, Youngseo |
| Agency | Orca Music |
| Country | South Korea |
| Current status | Pre-debut |
| Official debut date | Not announced |
| Debut release | Not announced |
| Album preparation | Confirmed |
| Fandom name | Not announced |
| Official color | Not announced |
| Official Instagram | @sidewalkcluboffcl |
| Official X | @SIDEWALK_CLUB |
| Official TikTok | @sidewalk_club |
| Official YouTube | @sidewalk-club |
The group’s official social accounts were launched alongside the September 14 name reveal.
Table of Contents
Who Is SIDEWALKCLUB?
SIDEWALKCLUB is the new K-pop project bringing together three former BAE173 members: Hyunwoo, Junseo and Youngseo.
The group’s formation follows a major transition at BAE173. On July 14, PocketDol Studio announced that the exclusive contracts of Yoojun, Muzin, Junseo, Youngseo and Bit had expired on June 30, 2026 and would not be renewed. The agency said the members had chosen to pursue new opportunities after discussions with the company.
Rather than pursuing their next steps separately, Hyunwoo, Junseo and Youngseo found a new home together at Orca Music. The agency announced their contracts on September 4 and said the trio would present a new team with more developed music and performances aimed at broader international activity.
That makes SIDEWALKCLUB more than a completely unknown rookie project. All three members bring previous professional idol experience, including years of group promotions, survival-show appearances and stage work.
How Was SIDEWALKCLUB Formed?
The project’s immediate origin can be traced to the end of the three members’ BAE173 contracts.
PocketDol Studio confirmed that Muzin, Junseo and Youngseo, along with Yoojun and Bit, ended their exclusive contracts on June 30, 2026. The announcement came publicly on July 14.
The next major step came in September. Orca Music signed the three members and announced that they would form a new team. According to Orca Music’s announcement, the company had held extensive discussions with the members about their future direction and potential before signing them.
On September 14, the project received its identity: SIDEWALKCLUB. The group simultaneously launched its official social accounts and published introductory visuals featuring all three members.
This chronology is important because it shows that SIDEWALKCLUB was not announced as an existing debuted act. It developed in several stages: contract separation from the previous company, new agency signing, then official team-name reveal.
Official Debut
SIDEWALKCLUB has not officially debuted yet.
Orca Music said on September 4 that the three members had begun working on music and performances and would move toward album production after revealing their new team identity.
As of September 14, however, the agency has not publicly provided:
- an exact debut date
- a debut single title
- an album title
- a tracklist
- a music-video release date
- an official showcase schedule
For now, the most accurate description is pre-debut boy group under preparation.
SIDEWALKCLUB Members
| Member | Birth Name | Birthday | Nationality | SIDEWALKCLUB Position |
|---|---|---|---|---|
| Hyunwoo | Kim Hyun Woo | March 29, 2001 | Korean | Not announced |
| Junseo | Park Jun Seo | December 28, 2001 | Korean | Not announced |
| Youngseo | Ryu Young Seo | June 13, 2002 | Korean | Not announced |
Birth dates and birth names are documented in the available member profile record. SIDEWALKCLUB-specific positions have not been announced, so BAE173-era roles are not being automatically carried over.
Hyunwoo
Stage name: Hyunwoo
Birth name: Kim Hyun Woo
Birthday: March 29, 2001
Nationality: South Korean
Former BAE173 name: Muzin
Current group: SIDEWALKCLUB
Hyunwoo is the member whose name changed most visibly between his BAE173 and SIDEWALKCLUB eras. He previously promoted as Muzin, while the new group’s launch materials identify him as Hyunwoo.
He was born in Changwon, South Korea, and debuted as a member of BAE173 in November 2020. Before SIDEWALKCLUB, he also appeared on JTBC’s PROJECT 7, where he finished 11th in the final episode.
His pre-debut history included training under Source Music, and his publicly documented background includes dance and performance. He has also been associated with the project group Double 0ne.
For SIDEWALKCLUB, his most important contribution may simply be the experience he brings from several different performance environments. Orca Music described the trio as artists preparing more developed music and performances, while iMBC highlighted Hyunwoo’s ability to handle both emotional expression and performance.
No official SIDEWALKCLUB position has yet been assigned to him.
Junseo
Stage name: Junseo
Birth name: Park Jun Seo
Birthday: December 28, 2001
Nationality: South Korean
Former group: BAE173
Current group: SIDEWALKCLUB
Junseo was born in Seoul and became publicly known as a member of BAE173 before moving into the SIDEWALKCLUB project. His earlier entertainment history reaches back further: he participated in the BOYS24 project before later joining BAE173.
He later competed on JTBC’s PROJECT 7, where he finished 21st. His pre-debut background also included dance training and performance work, including a documented backup-dancer appearance before his BAE173 debut.
Orca Music’s September announcement specifically describes Junseo as one of the three members building a new musical and performance identity. iMBC’s report noted that he had been particularly active in performance during his BAE173 years.
That experience makes the new group’s pre-debut phase especially interesting: Junseo is not starting from trainee-level exposure, but from several years of professional idol performance.
Youngseo
Stage name: Youngseo
Birth name: Ryu Young Seo
Birthday: June 13, 2002
Nationality: South Korean
Former group: BAE173
Current group: SIDEWALKCLUB
Youngseo was born in Changwon, South Korea. He became a member of BAE173 and later appeared on PROJECT 7, where he ranked 17th in the final.
He also took part in the project groups A-SIX and Double 0ne, giving him experience beyond his main BAE173 activities.
His strongest documented performance identity has traditionally been vocal. iMBC’s September 4 report specifically described Youngseo as a performer who had stood out through his tone and singing ability.
That creates an interesting balance for SIDEWALKCLUB. While the group has yet to reveal its first music, its members already arrive with different established performance backgrounds rather than an entirely uniform trainee profile.
Their BAE173 Connection
Understanding SIDEWALKCLUB requires understanding how quickly the members’ careers changed during 2026.
BAE173 debuted in November 2020. After several lineup changes over the years, PocketDol Studio confirmed in July 2026 that the contracts of Yoojun, Muzin, Junseo, Youngseo and Bit had ended on June 30.
For Hyunwoo, Junseo and Youngseo, the next stage became a shared project.
That transition is one of the most notable elements of SIDEWALKCLUB’s story. Instead of treating their previous group experience as a finished chapter, the three are carrying that accumulated stage experience into a new company and a new group identity.
Career Timeline
| Date | Development |
|---|---|
| Nov. 19, 2020 | Hyunwoo/Muzin, Junseo and Youngseo debut with BAE173 |
| 2024 | All three participate in PROJECT 7; Hyunwoo finishes 11th, Youngseo 17th, Junseo 21st |
| 2025 | Members participate in additional project activities including Double 0ne; Youngseo also participates in A-SIX |
| June 30, 2026 | Their PocketDol Studio exclusive contracts expire |
| July 14, 2026 | PocketDol publicly confirms the contract expirations |
| Sept. 4, 2026 | Orca Music announces exclusive contracts with the three members |
| Sept. 14, 2026 | SIDEWALKCLUB name and official social accounts are revealed |
| After Sept. 14, 2026 | Debut date remains unannounced |
The timeline is based on PocketDol’s contract announcement, the September Orca Music announcement and the members’ documented previous careers.
Music and Major Releases
SIDEWALKCLUB Discography
No official SIDEWALKCLUB music release has been announced yet.
Orca Music has confirmed that album preparation is underway, but there is currently no verified title, tracklist or release date.
That means readers should not confuse the members’ previous BAE173 releases with a SIDEWALKCLUB discography.
Once the first SIDEWALKCLUB release is officially announced, it will become the proper starting point for the group’s own discography.
Major Achievements So Far
Because SIDEWALKCLUB has not debuted, it does not yet have group-level:
- music-show wins
- chart records
- album sales milestones
- official awards
- streaming records
Its current achievements are therefore best understood through its members’ previous careers.
All three members had already debuted professionally with BAE173, and all three appeared on PROJECT 7. Hyunwoo, Junseo and Youngseo also participated in other project activities during their pre-SIDEWALKCLUB careers.
The trio therefore enters its new group with a level of stage experience that most traditional rookie groups do not have. That is an editorial observation based on their documented career histories, not a claim that SIDEWALKCLUB has already achieved a commercial milestone.
What Makes SIDEWALKCLUB Different From a Typical Rookie Group?
The group’s biggest distinguishing factor is experience.
SIDEWALKCLUB is being introduced as a new group, but none of the three members is new to the K-pop stage. Each had already spent years performing under BAE173, while their participation in PROJECT 7 gave them another round of exposure to competitive idol performance.
That changes the meaning of their debut preparation. The central question is not whether the members can handle a first stage. It is how successfully they can build a new identity that is distinct from BAE173.
That identity has only just begun to emerge. The September 14 launch visuals use an urban, street-oriented presentation, including the SIDEWALKCLUB logo and the slogan “Our SIDEWALK starts now. Are you ready to walk it with us?”
Until music is released, however, it would be premature to assign a definitive musical genre or claim that the visual concept represents the group’s permanent sound.
Is Hangyul Part of SIDEWALKCLUB?
There is currently no official confirmation that Hangyul is a member of SIDEWALKCLUB.
This question is understandable because Hangyul also signed with Orca Music in August 2026. His move to the agency was announced separately, however, and the September 4 announcement introducing the new group specifically identified Muzin/Hyunwoo, Junseo and Youngseo.
KpopBio therefore lists SIDEWALKCLUB as a three-member group unless Orca Music announces otherwise.
Latest Verified Update
Last Updated: September 14, 2026
The latest development is the official reveal of SIDEWALKCLUB and its social-media channels.
The three members are now publicly presented under their new group identity, but the project remains in the pre-debut stage. Orca Music previously confirmed that the members were preparing music and performances, so the next major official milestone should be related to their debut preparations or first release announcement.
No debut date should be published until Orca Music or SIDEWALKCLUB announces one.
What We Verified
The strongest confirmed information available as of September 14 is:
- SIDEWALKCLUB has three members.
- The lineup is Hyunwoo, Junseo and Youngseo.
- Orca Music is the group’s agency.
- All three members previously belonged to BAE173.
- Their previous PocketDol contracts expired June 30, 2026.
- Orca Music signed the three members on September 4.
- SIDEWALKCLUB’s name and official social accounts were revealed on September 14.
- Album preparation is underway.
- The group has not announced an official debut date yet.
What Is Not Officially Confirmed
Several details that commonly appear in K-pop profile searches are still unavailable:
Official positions: Not announced.
Fandom name: Not announced.
Official color: Not announced.
Debut date: Not announced.
Debut song: Not announced.
Album title: Not announced.
Group-name meaning: Not independently confirmed through a primary source.
Additional members: None officially announced.
The responsible approach is to leave these fields open rather than borrow details from previous BAE173 profiles or speculate from teaser imagery.
Official Accounts
According to the group’s launch announcement, SIDEWALKCLUB’s official channels are:
Instagram: @sidewalkcluboffcl
TikTok: @sidewalk_club
YouTube: @sidewalk-club
These accounts were launched as part of the official September 14 group reveal.
Member Summary
| Member | Birth Name | Birthday | Former BAE173 Name | Current SIDEWALKCLUB Role |
|---|---|---|---|---|
| Hyunwoo | Kim Hyun Woo | Mar. 29, 2001 | Muzin | Not announced |
| Junseo | Park Jun Seo | Dec. 28, 2001 | Junseo | Not announced |
| Youngseo | Ryu Young Seo | June 13, 2002 | Youngseo | Not announced |
Pre-Debut Timeline
| Date | Event |
|---|---|
| Nov. 2020 | Members debut with BAE173 |
| 2024 | Members compete on PROJECT 7 |
| June 30, 2026 | PocketDol contracts expire |
| July 14, 2026 | PocketDol confirms departures |
| Sept. 4, 2026 | Orca Music confirms new contracts |
| Sept. 14, 2026 | SIDEWALKCLUB officially revealed |
Frequently Asked Questions
Who are the SIDEWALKCLUB members?
SIDEWALKCLUB currently consists of Hyunwoo, Junseo and Youngseo.
Is SIDEWALKCLUB a K-pop group?
Yes. It is a South Korean boy-group project under Orca Music, although it has not officially debuted yet.
Who is Hyunwoo in SIDEWALKCLUB?
Hyunwoo is Kim Hyun Woo, born March 29, 2001. He previously promoted as Muzin in BAE173.
Who is Junseo in SIDEWALKCLUB?
Junseo is Park Jun Seo, born December 28, 2001. He is a former BAE173 member and a former PROJECT 7 contestant.
Who is Youngseo in SIDEWALKCLUB?
Youngseo is Ryu Young Seo, born June 13, 2002. He previously promoted with BAE173 and also participated in PROJECT 7 and other project activities.
What agency is SIDEWALKCLUB under?
SIDEWALKCLUB is under Orca Music.
When will SIDEWALKCLUB debut?
The debut date has not yet been announced.
Is SIDEWALKCLUB the new group of former BAE173 members?
Yes. The current three-member lineup consists of former BAE173 members Hyunwoo/Muzin, Junseo and Youngseo.
Did Muzin change his name to Hyunwoo?
Yes. The member previously promoted as Muzin is now being introduced as Hyunwoo in SIDEWALKCLUB materials.
Has SIDEWALKCLUB released a song?
Not yet. Orca Music has confirmed album preparation, but no SIDEWALKCLUB release has been announced.
Does SIDEWALKCLUB have a fandom name?
No official fandom name has been announced.
When was SIDEWALKCLUB’s name announced?
The group officially revealed the name on September 14, 2026.
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