BtoB 4U (Korean: 비투비 포유; stylized as BTOB 4U) is the second official sub-unit of South Korean boy group BtoB formed under Cube Entertainment. The sub-group consisted of members who have completed their military service Eunkwang, Minhyuk, Changsub and Peniel, who is exempt from conscription. They debuted on November 16, 2020 with the EP Inside, and made their debut stage on MBC Music's Show Champion on November 18.
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BtoB
South Korean pop band
1
BtoB Blue
South Korean boy band
2
Melody Day
South Korean girl group
3
Myteen
South Korean boy band
4
The Boyz
South Korean band
5
cignature
South Korean girl group
6
Lightsum
South Korean girl group
7
Wonho
South Korean singer
8
Loona
South Korean girl group
9
Cosmic Girls
South Korean girl group
10
Itzy
South Korean girl group
11
Laboum
South Korean girl group
12
Bobby
South Korean rapper
13
Blackpink
South Korean girl group
14
JJ Project
South Korean musical duo
15
CLC
South Korean girl group
16
SF9
South Korean boy group
17
Red Velvet
South Korean girl group
18
Berry Good
South Korean girl group
19
Block B
South Korean boyband
20
Stray Kids
South Korean boy band
21
GFriend
South Korean girl group
22
Treasure
South Korean boy band
23
DIA
South Korean girl group formed by MBK Entertainment in 2015
24
X1
South Korean boy band
25
STAYC
South Korean girl group
26
AB6IX
South Korean boy group
27
Phantom
South Korean hip-hop group