I absolutely adore this song and this PV. I suppose the first time I saw it, it was instantaneous love.
Here is some info on the band: Kagerou was formed in 1999 and ended activities in 2007. The Quartet was made up of Daisuke on vocals, Yuana on guitar, Kazu on bass and Shizumi on drums. The name of the band means “mayfly” in Japanese. Mayflies have after reaching adulthood, only a very short time to live. Daisuke choose the name because of the heart problems he suffered since he was young-the idea being that life could end for him at any moment. And tragically, he died in 2010 at the young age of 31.