Sungjae (Yook Sung Jae)

성재    육 성재

BtoB

Sungjae briefly studied for a month each in England and the Philippines. He attended Hanlim Multi Art School and graduated in 2014. He then attended Dongshin University and is majoring in Practical Music.

Sungjae made his official debut as a vocalist of BtoB with "Insane" and "Imagine" on March 21, 2012.

In 2013, he appeared in the television series 'Reply 1994' as Sungjoon/Ssukssuk, Na-jung's little brother.

In July 2014, Sungjae became a presenter for the program, 'A Song For You' with Kangin of Super Junior and Amber of f(x). He also participated in the program 'Hitmaker' and became part of the program's project unit group, Big Byung, together with Got7's Jackson and VIXX members, N and Hyuk. The same year, he received his first main acting role in 'Plus Nine Boys', playing a 19-year old Judo athlete. He then joined the reality-variety program 'Real Men' from 2014-2015.

Sungjae achieved breakthrough when he landed a leading role in the teen drama 'Who Are You: School 2015', alongside Kim So-hyun and Nam Joo-hyuk. He also released an OST for the show, "Love Song" with Park Hye-soo. 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 Moon Geun-young 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'.

In 2015, Sungjae joined 'King of Mask Singer', competing under the alias 'Tired Bumblebee', and received good feedback for his performance. He then paired up with Red Velvet's Joy in the fourth season of reality show 'We Got Married'. The couple released a duet song titled "Young Love", with Sungjae contributing to the lyric composition of the song. He received the "Best Couple award" with Joy and the "Best Male Rookie (in Variety) award" for his appearance in 'We Got Married'. In September 2015, he became one of the main host of the music-program 'Inkigayo' and left the show in May 2016.

In 2016, Sungjae was appointed as an ambassador of King Sejong Institution. He also became part of BTOB's first sub-unit, BTOB Blue, and debuted on September 2016.

From 2016-2017, Yook starred in the hit fantasy-romance drama 'Guardian: The Lonely and Great God' (also known as Goblin). He also joined the cast for the reality-documentary show 'Law of the Jungle' filmed in Sumatra, Indonesia.

On August 30, 2017 Sungjae made his solo debut through the "Piece of BtoB" project. He realeased 2 songs, the first being a self composed song entitled 'Paradise' while the second is entitled 'Speak'.

On May 3, 2020 Sungjae himself announced that he would be enlisting into the military for his mandatory time as an active soldier on May 11, 2020.

On October 18, 2023 it was announced that BTOB would be separating from Cube Entertainment, it was also said that the group would be staying together