Speed of Light

"Speed Of Light" is the second single by South Korea boy group Speed. The single album by promotional singles "슬플약속 (That's My Fault)". Release In December 9, 2012, Core Contents Media released the first teaser photo for "It's Over" for their debut album Superior Speed. Before the release of the debut album, Speed's they released single album "Speed of Light" the title is 슬플약속 (That's My Fault) feat. Davichi's Kang Minkyung. Background Two music videos were released for the song "슬플약속 (That's My Fault)" featuring Davichi's Kang Minkyung; a dance version and a drama version featuring Park Bo-young, A Pink's Naeun, Ji Chang-wook, and Ha Seok-jin. The part. 2 of drama version for their debut album Superior Speed by title track is "It's Over". Music and video