Rain Effect is the sixth Korean-language studio album by South Korean recording artist Rain. It was released through Cube DC on January 2, 2014, and was distributed by Loen Entertainment. It is his first studio album in 6 years since Rainism (2008) and his first musical release since Back to the Basic (2010). Rain Effect contains a total of ten tracks, including the lead singles "30 Sexy" and "La Song".

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.