B4U Boys (비포유 보이즈) was a pre-debut six-member boy group under Galaxia Entertainment. The group consisted of 24 contestants who had won in the show of the same name. On March 20, 2020, the final lineup of D2D was to consist of Chanyeong, Gahyeong, Jaebin, Saeyul, Sumin, and Cheoljoon.
Members[]
| Final Placement | Name | Unit | Year(s) Active |
|---|---|---|---|
| 1 | Song Chanyeong (송찬영) | Be-Lieve | 2020 |
| 2 | Kim Gahyeong (김가형) | Be-Lieve | 2020 |
| 3 | Yoon Jaebin (윤재빈) | Be-Token | 2020 |
| 4 | Son Saeyul (손새율) | Be-Tray | 2020 |
| 5 | Jung Sumin (정수민) | Be-Lieve | 2020 |
| 6 | Chae Cheoljoon (채철준) | Be-Ware | 2020 |
| Former | |||
| 7 | Lee Yoowoon (이유운) | Be-Ware | 2020 |
| 8 | Shin Soojae (신수재) | Be-Fore | 2020 |
| 9 | Bae Taekwang (배태광) | Be-Token | 2020 |
| 10 | Jang Sijin (장시진) | Be-Token | 2020 |
| 11 | Jeong Shibin (정시빈) | Be-Fore | 2020 |
| 12 | Yeo Soobin (여수빈) | Be-Fore | 2020 |