[1][B] The fans tentatively named the group "JBJ", which stands for the Korean phrase 정말 바람직한 조합, meaning "A Really Desirable Combination", and "Just Be Joyful".

[3][8][9] Discussions to officially form and debut JBJ began around early July 2017 between the seven tentative members and their respective agencies.

[10] CJ E&M and LOEN Entertainment also participated in the discussions as the intended management companies of the group's releases and activities, respectively.

[12] Since then, the involved parties, including CJ E&M and LOEN Entertainment, had numerous meetings to resolve the conflict but, as of September 7, had yet to reach an agreement.

[11] After more than a year of inactivity, during which he was unable to promote as an official member of JBJ, he has returned to the agency, now called Major 9 Entertainment.

The group's first reality show, Just be Joyful JBJ, began airing on September 27, 2017, on Mnet M2 Channel.

[15] On October 19, it was announced that JBJ would hold fan meetings all across Asia, starting in Japan (Tokyo and Osaka) on November 23 and 26 respectively.

[18] On January 3, 2018, JBJ announced the new extended play titled True Colors and also revealed the tracklist of the EP, followed by six individual teaser image of each members over the next six days.

[24] On February 22, Fave Entertainment and all of the members' agencies had officially been discussing the possibility of a contract extension until December 2018.