Guardian: The Lonely and Great God starred what BtoB boy group member?
Yook Sung-jae Yook Sung-jae (; born (1995--) 2, 1995 ) is a South Korean singer, actor and host. He is a member of the boy group BtoB and its sub-group, BtoB Blue. Aside from his group's activities, Yook is known for acting in television dramas, "" (2015), "" (2015) and "" (2016).
Be.A Be.A (Hangul: 비에이, shortened from Be. A rtist or Be an Artist; formerly known as K-Much) is a South Korean boy band formed under Chrome Entertainment in 2014. They debuted on 7 January 2014 as K-Much with the release of their first mini album "Beyond the Ocean". The group currently consists of five members: Hong-gyu, Yeong-kyun, Milly, Ato and BomB.