The group consists of eight members: E-Chan, D1, GK, Heechan, Lune, Junseo, Yuku, and Harry-June.

[2] The group made their debut on February 3, 2020, with the release of their extended play Youth and its lead single "Sorry Mama".

[5] On January 16, 2020, Brave Entertainment released a teaser image showing nine figures standing against a dark background with red lighting.

[15] In February 2023, it was announced that DKB will be included among the 24 contestants in the JTBC idol survival show, Peak Time.

[17] In the finale, DKB performed Monsta X Joohoney's song titled "Turning Point" and finished at 4th place.