... made his musical debut in the United States in July 2015 with the single "I'm Not Sorry", featuring Grammy winner Eric Bellinger. This set him apart from other Korean singers who have collaborated with American artists, the vast majority of which began their careers in Korea. That year he also collaborated with Mila Jon "Here & Now" and Anderson Paak on "Put My Hands on You".
He made his South Korean debut in October that year, and his second single "Pour Up", featuring Block B's rapper Zico, was named Best R&B and Soul Song at the Korean Music Awards on February 29, 2016. He also collaborated with Korean hip-hop artists Zion.T., Crush and Junggigo on the single "247", Dok2 on "I Love It",and Dynamic Duo on "How You Doin'?"