Lyric : Yurie Kokubo
Singer: Soichiro Hoshi
He is the seiyuu of Senri Shiki (Vampire Knight) n Kira Yamato (Gundam Seed). Also the seiyuu of Souma n Zero (Xero) in this wallpaper.
His voice is so good in that song! (U can listen it on the title)
Hikari no Shiruetto is an ending song from anime ShiningTearsXWind.