SID (シド, Shido) is a Japanese visual kei rock band, formed in 2003 and signed to Sony Records. Background SID (シド) was founded in 2003 by vocalist Mao (ex-Shula) and bassist Aki (ex-Ram Rem). They were joined by two support members, guitarist Shinji (ex-Uranus) and drummer Yuuya (ex-Shula). The four of them released the band's first demo CD, Yoshigai Manabu 17-sai (Mushoku) (吉開学 17歳 (無職)), on mini-disc that August and soon after, they signed on with Danger Crue Records.