MBLAQ is a South Korean boy band created by South Korean singer Rain under J. Tune Camp. The group consists of Seungho, G.O, and Mir, and formerly Lee Joon and Thunder. The group debuted on October 15, 2009, at Rain's Legend of Rainism concert.

Jung Ji-hoon, better known by his stage name Rain or Bi Rain, is a South Korean singer, songwriter, dancer, actor, and record producer. Rain's musical career includes seven albums, 28 singles and numerous concert tours around the world. He achieved breakthrough success with his third Korean album, It's Raining (2004), which spawned the number one single of the same name. The album sold over 200,000 copies in South Korea and one million copies throughout Asia, and established Rain as an international star.