C9 Entertainment is a South Korean entertainment agency founded in 2012 by Kim Dae-soon. The company operates as a record label, talent agency, music production company and event management. The company is home to artists including Younha, Lee Seok Hoon, CIX, Poetic Narrator, Cignature and Epex.

Go Youn-ha, known mononymously as Younha, is a South Korean singer-songwriter and record producer. She began her career in 2004 in Japan, where she was nicknamed the "Oricon Comet" for her success on the Japanese music chart. In 2006, she debuted in South Korea, where she is regarded as one of the country's best singer-songwriters.