[2] Dongkiz initiated promotional activities in August 2018, which included uploading dance covers onto Dongyo Entertainment's YouTube channel and busking.

[12] Dongkiz released their first mini-album Dongky Town and accompanying disco-EDM single "Fever" on November 6.

[14] The group was also invited to perform by the Korean Cultural Center in Turkey on December that year.

[21] In August that year, Dongkiz was again invited for a K-pop concert in Ankara, Turkey hosted by the Korean Cultural Center,[22] and Dongyo Entertainment announced that Wondae and Munik will be taking hiatus from group activities.

The agency also revealed its plans to rebrand Dongkiz by changing its name to DKZ and adding three new members to its lineup.

[34] As its winning prize, on November 29, the group attended and performed at the 2022 MAMA Awards held at the Kyocera Dome in Osaka, Japan.

[36] The group held its first live fan concert since their debut Welcome to DTU (Dongky Town University) on January 14 and 15, 2023 in SK Olympic Handball Gymnasium.

[38] In addition, on April 19, it was announced that Kyoungyoon would temporarily suspend his activities with the group for medical issues.

[42] On March 29, Dongyo Entertainment announced that DKZ will make a comeback on April 12 and release their second mini album Reboot.

[38] On May 18, 2023, Dongyo Entertainment announced the creation of a sub-unit called Nine to Six (Korean: 나인투식스), which name derives from the members' role in the TvN drama, The Heavenly Idol.

[53] The duo officially debuted and released their first single album Good To You on May 31, which contains a total of three songs including "Don't Call Me", "Nod" and "Digital Love".

[54][55] During their pre-debut, the group performed at the Charity Concert for Palu, Sigi, and Donggala held in Jakarta, Indonesia.

[57] DKZ has been continuously promoting the campaign to improve the welfare of firefighters in the Republic of Korea and support the treatment and recovery of low-income burn patients.