Choi Sung-yun최성윤 Born July 31, 1995 · 31 years old1 series · 2 films Open in my diary TV series with Choi Sung-yunCrash! Insignificant Roommates2019 · Choi Sung-yun Films with Choi Sung-yunGOLDEN CHILD ONTACT CONCERT - NOW2020 · YGOLDEN CHILD 1st CONCERT "Future And Past" in Seoul2020 · Y