HeartB (Korean: 하트비; RR: Hateubi) is a South Korean boy group formed by MarblePop Entertainment. The group consists of four members: Dojin, Jinwook, Chanyeong, and Byulha. They start their pre-debut activity releasing single "Shine" on December 3, 2014 and then made their official debut with mini album "Remember" on May 6, 2015.