Ha Sung-woon is a South Korean singer-songwriter. He debuted as the main vocalist for Hotshot in 2014 and later secured a place in Wanna One after participating in Produce 101 Season 2 in 2017. He has released several projects including the album Select Shop and the extended play STAGE FIGHTER(STF) Original, Vol. 4 featuring Yoo Hwe-seung. He also released the songs With you with Ji-min, What are we, and Gift. In 2021, he signed to BPM Entertainment and appeared in the series We Play.