Isak N Jiyeon was a South Korean R&B duo formed by SM Entertainment in 2002. The duo released one album, Tell Me Baby, in September 2002 before disbanding two years later following Isak’s departure. Later on, Jiyeon joined the line-up of SM's new girl group The Grace which debuted in 2005 while Isak continued to do a variety of work, such as being DJ and VJ for Arirang TV, MC work for various networks, and taking on small acting roles on network television.