UNB (Hangul: 유앤비), is a South Korean boy group formed through the KBS reality show The Unit. The group is composed of nine members: Jun, Euijin, Go Ho-jung, Feeldog, Marco, Ji Han-sol, Daewon, Kijung, and Chan. Their debut album, Boyhood, was released on April 7, 2018.

The Unit: Idol Rebooting Project

Prior to The Unit, all the members were actively involved in the entertainment industry: Feeldog debuted in 2012 as a member of Big Star, Euijin joined A.cian in 2014 under the name Lo-J but left the group in 2015 due to health reasons, later debuting again in 2016 as member of Bigflo. Daewon debuted as member of Madtown in 2014 who later disbanded during the show. Ko Hojung debuted as member of Hotshot in 2014. Jun joined U-KISS as youngest member in 2014. In 2017, Chan debuted as member of A.C.E, Kijung as member of IM, and Marco as member of Hot Blood Youth. Ji Hansol is a former SM Rookies trainee who left the company in 2017 to sign with J-FLO Entertainment and debut in upcoming boy band New Kidd. In July 2017, KBS announced their new survival show that would create male and female unit groups, with nine members each, among idols who had already debuted. The program aimed to give them a fair chance to demonstrate their talents that they might not have been able to showcase before. It premiered on October 28, 2017 and concluded on February 10, 2018.

On February 21, 2018, it was revealed that the male group, Uni+ B, would hold their first fan-meeting on March 3 at Blue Square iMarket Hall. The tickets sold out within two hours of being on sale. On February 24's broadcast of The Unit's Special Show, the final nine male contestants that formed “Uni+ B” became UNB following the announcement.

2018–present: Debut and Boyhood

On April 7, UNB officially made their debut with their extended play titled Boyhood. The EP featured double title tracks, "Feeling" and "Only One". They held their debut stage on You Hee-yeol's Sketchbook.- Wikipedia