Question: How Are You Bread stars a singer who is the leader of which boy group?

Related documents: [0]  [DOC] Kim Jun-myeon (born (1991--) 22, 1991 ), better known by his stage name Suho (meaning "guardian" in Korean), is a South Korean singer and actor. He is a member and leader of the South Korean-Chinese boy group EXO and its sub-unit EXO-K. [END] 
[1]  [DOC] How Are You Bread () is an upcoming South Korean-Chinese web drama starring Suho and Lee Se-young. The drama will be aired in South Korea and China simultaneously in 2017, and is currently in discussion to air in 30 other countries. [END]  
Answer: EXO
EXO