Stage Name: Sungjae (성재) He is a singer, MC, and actor. The single was to be a part of his single project where he was to release two songs every month for 3 months. He is a member and the third generation leader of the boy group BtoB and its sub-group, BtoB Blue. On the 23rd, the track list was r… Yook Sungjae (BTOB) Profile and Facts Sungjae (성재) is a member of South Korean boy group BTOB which debuted on March 21, 2012 with the song “Insane”. Yook Sung-jae (Korean: 육성재; Hanja: 陸星材; born May 2, 1995), better known mononymously as Sungjae, is a South Korean singer, songwriter, actor, host, and entertainer. The next day, teaser photos of him in the studio were released. Aside from his group's activities, Yook has acted in television dramas Who Are You: School 2015 (2015), The Village: Achiara's Secret (2015), Guardian: The Lonely and Great God (2016) and Mystic Pop-up Bar(2020) and has appeared on hit show… He is a member and the third generation leader of the boy group BtoB and its sub-group, … On December 20, 2019, a teaser photo was released on the BTOB twitter teasing the single "3X2=6 Part 1".