The members were introduced through a VCR in Exo Planet #3 - The Exo'rdium.
2016: Debut in Korea
On October 21st, SM Entertainment released their first teaser, which was called HOT DEBUT : EXO'S FIRST UNIT.
On October 23rd, the sub-unit released the OST of the drama Scarlet Ryo, "For You", in the Busan Asia One Festival.
On October 24th, SM Entertainment announced the name of the sub-unit: EXO-CBX.
On October 30th was released teaser of "Hey Mama!".
2017: Debut in Japan
On May 10th, through the official Japanese EXO Twitter account, SM Entertainment announced that EXO-CBX was going to have a Japanese debut during late May.
- Xiumin - leader, main dancer, main rapper, lead vocalist
- Baekhyun - main vocalist, lead rapper.
- Chen - maknae, main vocalist.
- Hey Mama! (2016)
- Girls (2017)
- "Final Life OST" ("Cry") (2017)