[2] The group performed regular shows in their own concert hall, with the debut of the final eight members IN2IT[3] on October 26, 2017.
[10][11] After completing 260 concerts,[3] the final group was selected from "The Final", consist of eight members: Yoo Youngdoo (Yoo Jiahn), Jeong Yeontae, Hwang Inho, Han Hyunuk, Isaac Voo, Lee Inpyo, Kim Jinsub and Kim Sunghyun.
It could be said that they had evolved to become a crystal, and among the 24 people, a few select members who had the highest level in all aspects would make their debut as an idol group.
[16] Forty-nine participants who passed the audition competed in a survival show which began airing on 18 June 2016.
[1] After the survival show ended, twenty-eight people were selected as Boys24 members, and the group held their concert three to five days a week in rotation.
[18][19] In September 2016, Yellow Unit from the group were chosen as the models for 새싹보리 a barley drink, sold by CJ Health Care.
[21] On September 27 and 28, 2016, the group held "Boys24 Live Preview" press call at their own hall to promote their own concert.
[29] On February 14, 2017, Lee Hwayoung was removed from the group and his contract was cancelled following his leaked audio controversy for making offensive comments about fans.
[30][31] On March 5, 2017, the group held 'BOYS24 The 1st Semi-Final' concert at the Hall of Peace at Kyung Hee University in Dongdaemun, Seoul.
[34] On March 10, 2017, CJ E&M and Liveworks announced that Jin Sungho to leave his position as part of the first promotional unit but still remain in the group following controversies about his past actions in junior high school.
[40][41][42] Hwang Inho, Jung Yeontae, Kim Jinsub, Kim Sunghyun, Yoo Youngdoo, Isaac Voo, and Jin Sungho were announced as final group members by fans vote, while Lee Inpyo and Han Hyunuk were selected as Wild Card directly by company, completing final line-up as nine-member group.
The five contestants with the highest votes were Jin Sungho, Jung Yeontae, Han Hyunuk, Kim Sunghyun, and Tak Jinkyu.
However, shortly after the survival show ended Lee Sangmin withdrew from the group then five eliminated members were revived to replace his position.
Unit Green consists of Jin Sungho, Go Jihyeong, Choi Chani, Jung Minhwan, Lee Inpyo, Kang San, and Chae Hocheol.
Collabo Green consists of Go Jihyeong, Lee Inpyo, Choi Chani, Jung Yeontae, Oh Jinseok, Kim Hongin, and Shin Jaemin.
The respective leaders from each unit are Jin Sungho, Hwang Inho, Park Doha, and Kim Sunghyun who were chosen from the members with the highest points voted by fans.
Unit White consists of Park Doha, Yoo Youngdoo, Oh Jinseok, Lee Louoon, Isaac Voo, Go Jihyeong, and Kang San.
Unit Red consists of Jin Sungho, Han Hyunuk, Tak Jinkyu, Choi Chani, Lee Haejoon, Kim Hongin, and Park Yongkwon.
On July 5, CJ E&M announced that Oh Jinseok would not be participating in the final of Boys24, but would finish the BOYS24 Live Concert up until August 6.