let us ride this coaster while it's hot. the song is part of the OST of Boys Before Flowers performed by ss501. ss501 is a 5 member group but because the leader (Kim Hyun Joong) is in the KDrama acting and another member (Park Jung Min) is busy with a stage play, the three others (Heo Young Saeng, Kim Kyu Jong and Kim Hyung Joon) have to do it themselves. it is a nice song by the way so i hope you enjoy. see the three lucky members below.