Lee Seung-chul (Korean: 이승철; Hanja: 李承哲; born December 5, 1966) is a South Korean singer best known for the hit songs, "My Love", "Never Ending Story", and "Girls' Generation". Currently an artist of Kakao Entertainment's label Flex M, he debuted in 1985 as the vocalist of the rock band Boohwal, which he left in 1989 to release his first solo album, Don't Say Good-Bye. He has released 12 Korean studio albums in total. He is also active in Japan, where he is known by the stage name Rui.