JUST B
GEONU · BAIN · LIM JIMIN · SIWOO · DY · SANGWOO
Profile
JUST B (저스트비) is a six-member South Korean boy group under Bluedot Entertainment, consisting of GEONU, BAIN, LIM JIMIN, SIWOO, DY and SANGWOO. They debuted June 30, 2021 with the mini-album JUST BURN and its energetic title track DAMAGE, produced by BANG YONGGUK.
Several members had well-developed individual careers before the group’s debut. GEONU and SIWOO (then known as JM) participated in I-LAND, while DY had performed with 1THE9 and BAIN participated in Under Nineteen. LIM JIMIN had already released two solo projects in 2019; he is properly classified as a solo artist as well as the group’s leader.
JUST B’s music includes the urgent dance drive of DAMAGE, the conceptual confidence of Tick Tock, RE=LOAD and ME=, and the alternative-leaning sound of MEDUSA. The group has participated in overseas touring and newer performance releases such as CHEST, gaining a following known as ONLY B.
As of October 2026 the team continues with six members. Its 2026 fifth anniversary was marked with an official fan event reflecting on shared memories from the U.S. tour. This profile distinguishes confirmed past releases from upcoming music that has not yet been formally dated.
Members
Career Milestones & Group Highlights
JUST B comeback recording activity
The six-member group continued sharing promotional and behind-the-scenes material for its next music cycle; unannounced release dates are not presented as confirmed.
Fifth anniversary
Fans celebrated five years since JUST BURN, with community events and international-tour memories.
CHEST performance video
The official performance video showed the group’s increasingly self-assured staging and urban-rock styling.
SIWOO stage-name change
The member formerly known as JM began promoting as SIWOO while retaining his group membership.
Build Up / The CrewOne
GEONU and BAIN appeared on Build Up; the wider group also participated in project collaboration activity.
MEDUSA
The band’s heavier alternative-influenced title song broadened the range of its stage concepts.
JUST BURN and DAMAGE debut
The six members debuted June 30 with DAMAGE, produced by BANG YONGGUK.
Official Videos by Year
Latest first · Official JUST B music videos only. Tap a thumbnail to play. If the embedded player is blocked, use the direct YouTube link.
GOING SOUTH
Official pre-release music video from the SNOW ANGEL era
CHEST
JUST ODD · Official music video (not the performance-only cut)
Official SNS
News & Further Reading
Global + Korean news in one list · 최신순 통합 기사 · Interviews, music and industry