From left, Yuuya(Dr), Mao(Vo), Aki(Ba) and Shinji(Guitar).

SID (シド) was formed in 2003 by Mao and Aki. The band was soon joined by Shinji and Yuya. They began as a visual kei band but Mao wanted to leave that scene as soon as possible so the band could develop their own style. In 2004, they gave some live performances. Indeed, in May 2004, the SID are selected to go to Anime Central, a popular anime convention in the United States, because of Miyavi's cancellation. They thereafter signed under the label of Sony, Danger Raw Records, producers various of Jrock and Visual bands. They released their first album in 2004, [Renai], a limited edition of 10 000 copies only. In April, the SID give two concerts of which all the places will be sold! One 3rd album is announced for November followed by a winter round. 2006 will thus be seen being the year of the concretization for the group, which completed its reconversion of the Visual style for their own style and their particular musical universe. It also should be specified that these boys compose and write absolutely all their songs (the words are written by Mao and the majority of the compositions are carried out by Aki and Shinji).
Official site

Monochrome no Kiss PV (OP of anime Kuroshitsuji)