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”. He is a singer, MC, and actor. Stage Name: Sungjae (성재) Birth Name: Yook SungJae (육성재) Position: Vocalist, Face of the Group, Maknae Birthday: May 2, 1995 Zodiac Sign: Taurus Height: 180 cm (5’11”) Weight: 68 kg … Continue reading Yook Sungjae (BTOB) Profile and Facts