Pre-debut
In 2019, Eunsang competed on the show Produce X 101 representing Brand New Music alongside Kim Si-hun, Yun Jung-hwan, and Hong Seong-jun, now of BDC. In the show's finale, he was made a member of the show's debut lineup in the 'X' position, making him a member of the group X1.[2] He made his debut with the group on August 27, 2019, and amidst the Mnet voting manipulation scandal, the group ultimately disbanded on January 6, 2020.[3]
On August 31, 2020, Eunsang made his solo debut with the single album Beautiful Scar.[4] For the lead single, "Beautiful Scar", he collaborated with Park Woo-jin.[5][6] In October, Eunsang collaborated with former X1 groupmate Kim Woo-seok for the single "Memories".[7] On August 16, 2021, it was announced that Eunsang will be releasing his second single album Beautiful Sunshine and its lead single "Lemonade" on September 1.[8]
In 2021, Kyungmun competed on the show Loud.[9] Kyungmun represented JYP Entertainment alongside Lee Gye-hun and Amaru.[10] He was eliminated in the fifth round.
2022–present: Debut with Youni-Birth, Youni-Q, Youni-On, Bit: Pt. 1 and Hyunseung's departure
On March 18, Brand New Music announced that Younite will make their debut with their first extended play (EP), Youni-Birth on April 20, 2022.[11]
On July 25, Younite released their second extended play, Youni-Q.[12]
On October 31, the group released their third extended play, Youni-On. including their lead single "Bad Cupid",[13] However, on October 30, the label announced the cancellation of the comeback showcase due to the national mourning period following the Itaewon Halloween crowd crush incident on the 29th.[14]
On April 25, 2023, the group announced their fourth extended play, Light: BIT Part.1, which was released on May 17 of that year, with the lead single "Waterfall".[15]
On July 2, 2024, Brand New announced that Hyunseung departed from the group due to personal reason. Younite would continue to promote as an eight-member group thereafter.[16][17]