Sid are a Japanese Visual-Kei band, formed in 2003. (this is getting usual huh? xD)
I'm not a BIG fan, but I do like their music and look, though I dislike their look in this video, it looks too "sloppy".
This is song is called Otegami (in english) and it was released as a single in 2006 with this PV!
Sid are formed by Mao (Vocals), Shinji (Guitar), Aki (Bass) & Yuuya (Drums)
Hope you enjoy ^^