MustB Members Profile and Facts MustB (머스트비) is currently a 5-member male Kpop group that consists of Doha, Taegeon, Wooyeon, Soohyun, and Sihoo. They debuted on January 21, 2019 under MUSTM Entertainment. On April 21, 2019 MustB was involved in a car accident. Following the car accident Hawoon and Sangwoo both left the group. MustB … Continue reading MustB Members Profile