Yoon Hyun-sang (born January 14, 1994) is a South Korean singer-songwriter who gained early attention as a top 7 finalist on the first season of K-pop Star. He made his official debut on October 31, 2014 with the album Pianoforte, featuring the collaborative single “When Would It Be” with IU. The album charted at number 26 and was followed by Wave (파랑) in 2015 and Attitude in 2017, both released under Kakao Entertainment and later Mun Hwa In, peaking at numbers 30 and 44 respectively. In 2019, he released the album Lover. Yoon has released multiple singles, including “Letting Go” (2022), “Someone I Think About Sometimes” (2024) and "Wander" (2025).