Isak N Jiyeon (이삭 N 지연) was a Korean R&B duo formed by SM Entertainment in 2002. The duo debuted with the full-album Tell Me Baby in September 2002 and disbanded two-years after 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.