Military Service Hyunseung Completes Military Service 5 years ago Former BEAST member and current Cube Entertainment solo artist Jang Hyunseung has been discharged from the military. The singer,… BtoB’s Yook Sungjae to Enlist This Year 5 years ago On March 16, 2020, Cube Entertainment confirmed that BtoB’s Yook Sungjae plans to enlist this year after he announced…