Task: Explanation
Input (English): 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). Question: What is the name of the South Korean man who is in the television show The Village: Achiara's Secret, and is a member of the group BtoB? Answer: Yook Sung-jae
Output (English):  He is a member of the boy group BtoB and its subgroup, BtoB Blue.