• A fan-meeting for UNB and UNI.T was held at Blue Square iMarket Hall on March 3, 2018. • UNB debuted with their first
EP Boyhood with the lead single "Feeling" on April 7, 2018. They followed up with a comeback through the mini album "Black Heart" on June 28. The title track "Black Heart" features former The Unit contestants Jungha (formerly of
Beatwin), Anne (of
S.I.S) and Hangyul (of IM), together with
DIA member Jueun as back-up performers. • UNI.T debuted with their first EP
Line with "No More" as its lead single on May 18, 2018. The group pre-released the single "Begin With the End" on September 15, before releasing their second and final mini album "Begin With The End", with the title track "I Mean" on September 18. ZN will not be involved in this comeback due to Japanese promotions with her group
Laboum. On October 12, 2018 the group performed "I Mean" and "Begin With The End" for the last time at
Music Bank and later on the same day they held their last fan-meeting as a group, after which they have disbanded. • Several group members resumed activities : • Ji Han-sol debuted as a member of
Newkidd with the single "Shooting Star" on July 25, 2018. • ZN, together with Yujeong and Haein, returned to
Laboum with the single album "Between Us" on July 27, 2018. •
Yebin, together with Somyi, returned to
DIA with the mini album "Summer Ade" on August 9, 2018. • NC.A released "I'm Fine" on October 13, 2018. • Go Ho-jung, together with Timoteo, returned to
Hotshot and the group released a mini album "Early Flowering" on November 15, 2018. The group disbanded on March 30, 2021. • Feeldog returned to Big Star. However the group disbanded a few months later due to the expiration of members' contracts, He then participated in
Street Man Fighter under the crew "Bank Two Brothers". • Soya returned as a soloist with the single "Show" on January 31, 2018. She released another single "Oasis" on April 18, 2018. With
B.I.G member and fellow former The Unit contestant Heedo as featuring, she released a single titled Y-shirt (Deep Inside) on July 31, 2018. • Kang Min-hee returned as a soloist on February 14, 2018, with the single "Toddle". • Lena participated in
Produce 101 China. • Seol Ha-yoon returned as a
trot singer with a cover of
LPG's "Ring My Heart" on April 13, 2018. • Jeup, Taeho, Jian and Ungjae returned to
Imfact with the single "The Light" on April 17, 2018. • Sangil, Suhyun and Sebin returned to
Snuper with the EP
Blossom on April 24, 2018. • Kanto returned as a soloist on May 15, 2018 with the EP
Repetition. • Euna Kim debuted in duo KHAN with former The Ark member Jeon Min-ju on May 23, 2018 with the single "I'm Your Girl?". However, after three years of inactivity, she announced her retirement from the entertainment industry on May 24, 2021. • Yena returned to G-reyish with the single "Remind" on May 24, 2018. • Junghoon and Kyeongha returned to
TST with the single "Love Story" on May 25, 2018. However, on June 11, it was announced that Kyeongha left the group due to him being found guilty of sexual assault. • Jun returned to
A.C.E with the single "Take Me Higher" on June 8, 2018. • Yeoeun, Yoomin and Chahee returned to
Melody Day with the single "Restless" on June 29, 2018. The group officially disbanded on December 26, 2018. • Rockhyun returned to
100% with the single "Grand Bleu" on July 26, 2018. This is also the group's first single since the death of leader
Seo Min-woo, who also auditioned for the show but failed to receive any boots. The group disbanded on September 27, 2021. • Taro returned to H.B.Y and together with fellow H.B.Y members Jisan and Kyuhyuck, they formed a sub-unit of the group "H.B.Y (TaJiHyuck)". They released the single "Waiting" on July 26, 2018. • Lex, together with current UNB member Euijin, returned to
Bigflo with "Upside Down" on August 18, 2018, but promoted the song a week before its release. • Lee Ju-hyeon participated in KBS dance survival show "Dancing High". She subsequently debuted with girl group
Lightsum in June 2021. • The band MAS was revealed to re-debut under the new band name
Onewe. They made their official re-debut with their single "Reminisce About All" on May 13, 2019. • It was announced that Casper will participate in
Idol Producer Season 2 but he left the show after the first episode. • Hangyul participated in
Produce X 101 and became a member of winning group
X1. He subsequently became a member of
BAE173 after X1's disbandment. • Yuji, Sandy and Haeun returned to APPLE.B but the group had disbanded. Sandy left her company, while Yuji and Haeun re-debuted with
3YE on May 21, 2019 with the single "DMT (Do Ma Thang)". •
Good Day had disbanded. • Chaesol,
Jiwon, Viva and Lucky re-debuted with
Cignature on February 4, 2020 with the single "Nun Nu Nan Na". The latter three re-debuted with new stage names Jeewon, Sunn and Belle respectively. • Belle re-debuted through the survival show
Universe Ticket in 2024 as a member of
UNIS under her real name, Jin Hyeonju. • Genie re-debuted with
Redsquare on May 19, 2020, under the stage name Green, with the single album "Prequel". Redsquare subsequently disbanded and had rebranded as
Irris, where she re-debuted again under the stage name I.L. • Yujeong and Eunji returned to Brave Girls with the release of the digital single "We Ride" on August 14, 2020. The group got a sudden rise in popularity after their song "Rollin" became viral in 2021. The group got their first win on March 14, 2021 with "Rollin". • Tae.E has re-debuted with girl group
Lunarsolar on September 2, 2020 with the single "Oh Ya Ya Ya", under the new stage name Jian. == Notes ==