Yoon Ji Sung (윤지성) ; born 08, March 1991 . is a South Korean singer of LM Entertainment. In 2017 he survived the second season of Mnet's Produce 101 and qualified to be a member, and the leader, of the Wanna One group until December 2018. He made his solo debut on February 20 (2019) with the song 'In the Rain', part of his first mini album 'Aside'.