• Sungjae (성재) is a South Korean singer, songwriter, actor, and entertainer who is currently signed under Cube Entertainment. He is currently a member of boy group BtoB.

    I. Personal Life

    Sungjae was born Yook Sungjae (육성재) on May 2, 1995 in Yongin, Gyeonggi Province. His grandfather was the first one to introduce red carp in South Korea. He briefly studied abroad in English and the Philippines as a child. He attended Hanlim Multi Art School and graduated in 2014.

    On May 11, 2020, Sungjae announced via Instagram that he would be enlisting for his mandatory military service. He is currently serving as a member of the military band and will be discharged in November 2021.

    II. Career

    III. BtoB

    Sungjae debuted as a vocalist for BtoB n March 21, 2012. He also participated in the subunit BtoB Blue. He briefly served as BtoB's leader after Minhyuk's enlistment.

    IIII. Solo Activities

    In March 2012, Sungjae was chosen as co-host of SBS MTV's The Show alongside group member Minhyuk.

    In 2013, Sungjae made his acting debut in the drama Monstar as part of the supporting cast. Sungjae acted as Arnold, a member of boy idol group 'Men In Black'. He appeared in 4 episodes in total.

    In 2014, Sungjae appeared in the television series Reply 1994 as Sungjoon. In July 2014, he was cast as a presenter for the program, A Song For You alongside Kangin of Super Junior and Amber of f(x). He also participated in the program Hitmaker season 1, presented by South Korean producer duo Jeong Hyeong-don and Defconn and became part of the program's project unit group, Big Byung, together with Got7's Jackson and VIXX members, N and Hyuk. The group then releases two singles: "Stress Come On" and "Ojingeo Doenjang". The same year, he received his first main acting role in Plus Nine Boys. He then joined the reality-variety program Real Men from 2014–2015.

    Sungjae achieved his breakthrough when he landed a leading role in the teen drama Who Are You: School 2015 After the series ended, he experienced a rise in popularity and landed several endorsement deals. Sungjae then starred in the horror mystery series The Village: Achiara's Secret alongside in 2015. He received the "New Star award" for his performance in The Village: Achiara's Secret and won "Best Couple award" with Kim So-hyun for Who Are You: School 2015.

    Sungjae was paired up with Red Velvet's Joy in the fourth season of reality show We Got Married. The couple went on to release a duet titled "Young Love", with the pair contributing to the lyric composition of the song with the help of his bandmate BTOB's Im Hyun-sik as the producer. At the 2015 MBC Entertainment Awards, Sungjae received the "Best Couple award" alongside Joy and the "Best Male Rookie (Variety) award". In September 2015, Sungjae became one of the main hosts of the music-program Inkigayo alongside GOT7's Jackson Wang and actress Ki Yoojng. He left the show in May 2016.

    From 2016 to 2017, Sungjae starred in the hit fantasy-romance drama Guardian: The Lonely and Great God. In August 2017, he participated in the digital single project, Piece of BtoB. He released the songs "Say It" and "Paradise", the latter having been personally composed and written by himself, on August 30. In late 2017, he joined the cast of the reality show, Master in the House.

    On December 29, 2017, Cube Entertainment announced that Yook suffered a back injury and would be receiving treatment at the hospital. He had symptoms of lumbar disc herniation reportedly worsened during the concert 2017 BtoB Time - Our Concert.

    Sungjae appeared in Mystic Pop-up Bar, a JTBC drama based on a popular webtoon of the same name in early 2020. On February 18, he left the cast of Master in the House after two years for the preparation of his mandatory military service. Sungjae released his first solo album since debut Yook O'Clock on March 2, 2020 which consisted of six songs from 3X2=6 and lead single "Come with the Wind".

    III. Discography

    Artwork Title Release Date
    Tell Me (Piece of BtoB, Vol. 6) August 30, 2017
    Yook O'Clock March 2, 2020

    IV. Filmography

    IVI. Dramas

    Year Title Role Network
    2013 Monstar Arnold Mnet
    2013 The Heirs Himself (cameo) SBS
    2013 Replay 1994 Sung Joon tvN
    2014 Plus Nine Boys Kang Mingu tvN
    2015 Who Are You: School 2015 Gong Taekwang KBS2
    2015 The Village: Achiara's Secret Park Woojae SBS
    2016-17 Guardian: The Lonely and Great God Yoo Deok-hwa tvN
    2018 Dae Jang Geum is Watching Oh Sungjae (cameo) MBC
    2020 Mystic Pop-up Bar Han Kangbae JTBC

    IVII. Variety Shows

    Year Title Role Network
    2012 The Show Main Host SBS MTV
    2014 Hitmaker Cast Member MBC
    2014 Real Men Cast Member MBC
    2014 A Song For You Main Host KBS
    2015 Invisible Man Cast Member KBS
    2015 King of Masked Singer Contestant MBC
    2015-16 Inkigayo Main Host SBS
    2015-16 We Got Married Cast Member (with Joy) MBC
    2016 Duet Song Festival Contestant MBC
    2017 Fantastic Duo Contestant SBS
    2017 Celebrity Bromance Cast Member MBigTV
    2017 Law of the Jungle in Sumatra Cast Member SBS
    2017-20 Master in the House Cast Member SBS
    2019 Lovely 95s Cast Member Cube TV


    Year Award Category Nominated Work
    2015 KBS Drama Awards Best Couple (with Kim Sohyun) Who Are You: School 2015
    2015 MBC Entertainment Awards Best Male Newcomer Award (Variety) We Got Married
    2015 MBC Entertainment Awards Best Couple Award (with Joy) We Got Married
    2015 SBS Drama Awards New Star Award The Village: Achiara's Secret
    2017 Korea Cable TV Awards Rising Star Awards Guardian: The Lonely and Great God
    2017 10th Korea Drama Awards Best New Actor Guardian: The Lonely and Great God
    2017 10th Korea Drama Awards Star of the Year Award Guardian: The Lonely and Great God
    2017 Korea's First Brand Awards Male Acting Idol -
    2018 MTN Braodcast Advertising Festival CF Male Star Award -
    2018 SBS Entertainment Awards Excelelnt Award Variety Department Master in the House
    2019 SBS Entertainment Awards SNS Star Award Master in the House