I use to listen to this beautiful song once a year staying at my village house. It's a little tradition of my own. I pray for the dark times my homeland experiencing now to end, so I can visit my village and enjoy this piece of art once again. Gotta thank Ceui for creating such a masterpiece :)
It sounds like Haruka Shimotsuki wrote the music and the backing vocal lines sound like Kalafina. This sounds like a song that Keiko Kubota could lead.