Su Bin is a South Korean singer and actress born in Gwangju, South Korea. She started her career in 2011 when she debuted as a member of a girl group Dalshabet. She made headlines when she produced Dalshabet's whole mini-album "Joker Is Alive" in 2015 and debuted next year as a soloist with self-written songs "Hate" and "Flower".

In 2017, Su Bin left Happyface Entertainment with Dalshabet members Serri and Ayoung; the group, however, did not disband and is on an indefinite hiatus as of 2019. Later, Su Bin signed with KeyEast Entertainment with an intention to pursue acting and also set up her own agency DalsooobinCompany, under which she continued her singing career. In 2019, prior to her solo comeback, she changed her stage name to DALsooobin and announced that she would continue promoting as a singer under that name.