BtoB Blue
BtoB Blue (Korean: 비투비-블루) is the first official sub-unit of South Korean boy band BtoB formed under Cube Entertainment in 2016. The sub-group consists of the group's vocal line Eunkwang, Changsub, Hyunsik and Sungjae. The sub-unit debuted with their digital single titled "Stand By Me" on September 19, 2016.
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Discography
Music Videos
When it rains
Stand by me