Jeon Do-yum

Jeon Do-yum is a South Korean singer, rapper and dancer, best known as the main rapper and main dancer of the K-pop boy group JUST B under Bluedot Entertainment. Born on February 21, 2002 in Daejeon, he first rose to fame by winning the survival show Under Nineteen in 2018, becoming the center of the project group 1THE9. After 1THE9's disbandment, he debuted with JUST B in June 2021 and has since been a key performer in the group's powerful, hip-hop-driven sound. Fans know him for his sharp dance skills, acrobatic moves, and charismatic stage presence. As of 2026, he continues to promote with JUST B, building a dedicated fanbase that appreciates his intense energy and versatility as an all-rounder idol. [edit]

Jeon Do-yum grew up in Daejeon with his parents and one brother. He showed an early passion for dance, especially urban dance and acrobatics, which he later made his specialty. He attended Hanlim Multi Art School, graduating from the Practical Dance department. Before his big break, he trained under C9 Entertainment and later FAVE Entertainment (now Play M Entertainment), and was part of the pre-debut trainee group PlayM BOYS. In 2018, he competed on the survival show Under Nineteen as a member of the Performance Team. His powerful dance performances and stage presence earned him first place overall, making him the center of the project group 1THE9. That victory launched his career, leading to his debut with 1THE9 in 2019. [edit]

Jeon Do-yum debuted with 1THE9 through their first mini-album XIX in 2019. The group released several songs and built a modest following before disbanding in 2020 after the release of Good Bye 1THE9. In May 2021, he was revealed as the third member of JUST B, a new boy group under Bluedot Entertainment. He debuted with JUST B on June 30, 2021, with the mini-album Just Burn, featuring the title track Damage. As the group's main rapper and main dancer, he contributed to multiple releases including RE=LOAD (2022), ME= (2023), and Youth (2024). JUST B's music leans into dark, intense concepts with hip-hop and electronic influences, and Do-yum's deep rap tone and acrobatic dance breaks became signature elements. The group has toured internationally and continues to release music as of 2026. [edit]

Jeon Do-yum is known for his powerful, sharp dance style and deep, charismatic stage presence as JUST B's main rapper and main dancer. He brings an intense, hip-hop energy to the group's dark concept, often incorporating acrobatic moves into performances. Fans appreciate his versatility and the emotional depth he brings to both rap and dance. His personal social media voice is not heavily documented, but he interacts with fans through group content and fan meetings. The group's fandom is called ONLY B, and fans admire Do-yum for his dedication to performance and his unique charm. [edit]

Jeon Do-yum commands a dedicated following that has grown steadily since his debut, though he has not yet reached the tier of global ubiquity where universal recognition is automatic. His reputation rests firmly on his distinct contributions to the K-pop landscape as a main rapper and dancer for JUST B, with a specific resonance among fans who followed his trajectory from Under Nineteen through 1THE9 to his current group. Despite his intense stage presence and the group's recent musical evolution into hyperpop, iFANN has not yet collected sufficient data to assign him a specific rank in its global or category-based fame indices. Consequently, no numerical placement can be cited for Jeon Do-yum at this time, as the metrics required to determine his standing relative to other public figures are still being gathered. The audience surrounding him remains largely defined by their support for JUST B rather than a separate, individually named entity. While the group maintains an active fanstagram account, research confirms there is no officially confirmed fandom name dedicated exclusively to Jeon Do-yum himself. Fans generally identify collectively under the group's banner, engaging with his content on social media platforms where he shares updates and interacts directly with followers. This organic connection sustains his profile without the need for a formalized individual title.[edit]

Jeon Do-yum carries several beloved nicknames among fans, including Jeondooyeob, Sikdoyum, and Voluptuous Doyum. He finds joy in watching fantasy movies and taking leisurely walks, though he admits to disliking summer weather and wasabi. His palate favors hearty Korean dishes like samgyeopsal, galbitang, and kalguksu. A distinctive heart-shaped mole sits on the center of his lower neck, a fact he often shares as his favorite TMI. If he were the last person on Earth, he jokes he would sleep before heading to a supermarket to eat everything he wanted. His MBTI type is ISTP-A, and his representative emoji is a cat (🐱). While no viral legends or specific folklore surround him personally, his history remains grounded in professional milestones. He rose to prominence as the center of the project group 1THE9 after participating in Under Nineteen. His debut with JUST B in June 2021 featured the Bang Yong-guk-produced track "DAMAGE", setting a high bar for their hip-hop-driven sound. More recently, the group introduced the first hyper-pop track for a K-pop boy group in April 2025, followed by the SNOW ANGEL album in November 2025, marking significant musical evolution for the team he leads.[edit]

Jeon Do-yum has one brother. No further details about his parents or extended family are publicly known. He currently lives in South Korea and keeps his personal household private. He has not shared any information about pets or his current living situation. [edit]

Jeon Do-yum is closely associated with his JUST B bandmates: Geonu, Bain, Lim Jimin, and Sangwoo. He was also a member of 1THE9 alongside other trainees from Under Nineteen. He previously trained under C9 Entertainment and FAVE/Play M Entertainment. [edit]

As of 2026, Jeon Do-yum has no publicly confirmed romantic relationships. No credible sources report any dating history, engagements, marriages, or high-profile flings. He has never been publicly linked to any partner. His latest reported status is single. [edit]

iFANN currently estimates Jeon Do-yum's net worth to be between $100,000 and $500,000 USD. As a member of JUST B under Bluedot Entertainment, his income primarily comes from group album sales, digital streaming revenue, concert tours, fan meetings, and merchandise sales. No individual endorsements or business ventures have been confirmed. Industry estimates for mid-tier K-pop boy group members typically range from $100,000 to $500,000 USD, but these figures are speculative. His net worth has likely grown gradually since his debut with JUST B in 2021, driven by the group's consistent releases and touring. As of 2026, Jeon Do-yum's exact net worth is not publicly disclosed.[edit]