I recently listened to them and liked very much... It's very good!!
Some of the latest album-singles from Sound Horizon:
Shounen wa Tsurugi wo -
http://www.amazon.co.jp/%E5%B0%91%E5...700299-1837965
Seisen no Iberia -
http://www.amazon.co.jp/%E8%81%96%E6...pf_rd_i=562060
But, I cannot find its lyrics, does anyone have any idea where I can find..?