Fly to the Sky is a South Korean R&B duo, consisting of Korean-American Brian Joo and South Korean native Hwanhee. Initially marketed as a duo that can sing, rap, and dance, their early works featured bubblegum pop and upbeattechno music. The duo later changed their image and style with the release of Sea of Love in 2002. With their subsequent albums, the duo solidified their status as R&B artists and are credited as the first R&B duo of South Korea. The duo's debut single "Day by Day" was a light bubblegum love song. Their subsequent songs were a combination of R&B, pop rap, and hip-hop until 2002, when the duo abandoned bubblegum pop. Since 2002, they opted for a blend of heavy R&B and Korean pop. They continue to sing love songs, and some of them continue to incorporate hip-hop and rap from Joo.