In 2016, Jae-hwan appeared on the pilot episode of SBS' Vocal War: God's Voice. He challenged veteran singer Yoon Do-hyun with his own rendition of YB's "Autumn Outside the Post Office" and won, becoming the show's first winner.[1][10] In the next round, he challenged Lena Park with a cover of Park's "Sorry" but did not win, and therefore eliminating him as a contestant.[1]