The Pulse of K-Entertainment

BOYNEXTDOOR
GroupKOZ Entertainment

BOYNEXTDOOR

BOYNEXTDOOR (보이넥스트도어) is the first idol group launched by KOZ Entertainment, the label founded by Zico before it folded into HYBE. Sungho, Riwoo, Jaehyun, Taesan, Leehan, and Woonhak were introduced with a concept that sounds simple on paper, but the group's appeal has always come from execution: conversational songwriting, tight hooks, and performances that feel relaxed without ever looking casual.

The run from Who! and Why.. into How?, 19.99, and No Genre turned BOYNEXTDOOR into one of the cleaner examples of how fifth-generation boy groups can scale without losing identity. Their music stays rooted in youth, crushes, awkwardness, and self-talk, but the production has enough detail to keep the easy-listening pitch from feeling lightweight.

That balance is the point. BOYNEXTDOOR sells familiarity, but the group has been disciplined about turning everyday emotion into a repeatable sound, which is why the KOZ rollout has translated from domestic breakout to a real two-market presence across Korea and Japan.

5 articles10 creditsDebut: May 30, 2023South Korean

Members

SunghoVocalist
Woonhak
WoonhakVocalist, Maknae
LeehanVocalist, Dancer
Jaehyun
JaehyunLeader, Rapper
RiwooVocalist, Dancer
TaesanMain Vocalist

Gallery

Discography

2026
HOMEAlbum
2025
The ActionEP
2025
No GenreEP
2025
If I Say, I Love YouSingle
2024
19.99EP
2024
How?EP
2023
Why..EP
2023
Who!Single

Filmography

2026
BOYNEXTDOOR Tomodachi BaseVariety Show

Other Credits

2026
KNOCK ON Vol.2 World TourConcert Tour

Fans Also Ask

Who are the members of BOYNEXTDOOR?
BOYNEXTDOOR has six members: Sungho, Riwoo, Myung Jaehyun, Taesan, Leehan, and Woonhak. KOZ Entertainment introduced the group as its first boy band, and the team officially debuted on May 30, 2023. The lineup has stayed unchanged since debut, which helped the group build a clear identity early.
When did BOYNEXTDOOR debut?
BOYNEXTDOOR debuted on May 30, 2023 with the single album Who!. KOZ released all three tracks from the project as promoted singles, an unusual launch move that immediately set the group apart. The debut framed their now-signature mix of easy-listening pop, youth storytelling, and emotionally direct lyrics.
What are BOYNEXTDOOR's key releases?
The group's core releases include Who! and Why.. in 2023, How? and 19.99 in 2024, plus the 2025 run of If I Say, I Love You, No Genre, and The Action. How? gave BOYNEXTDOOR its first No. 1 on the Circle Album Chart, while Why.. put them on the Billboard 200.
What does the name BOYNEXTDOOR mean?
The name BOYNEXTDOOR refers to the familiar boy-next-door image: approachable, casual, and close to everyday life. KOZ has used that framing from the start, and it lines up with the group's music, which often turns ordinary emotions, first-love moments, and awkward youth stories into polished pop records rather than distant idol fantasy.
Is BOYNEXTDOOR active in Japan too?
Yes. BOYNEXTDOOR expanded into Japan in 2024 through Universal Music Japan, starting with the maxi single And,. That move was followed by the EP 19.99 and later live activity tied to the Knock On Vol.1 era, helping the group establish a real two-market footprint instead of treating Japan as a one-off promo stop.

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