The song is from IZUMO3 of Studio Ego! And I tried to recover the ED by the CGs of the game.
Prepared with the movie uploaded some days ago,the subtitle is substituted with the tranlation of Seldis.
And this is his blog
http://blog.xuite.net/yoketsu/izumo
A new movie of "Eternal Kindom" from Studio EGO!
Prepared with the old version,the main section of the movie is substituted with the OP of the GAME CD,which is published on 2008.7.25.
"エターナル・キングダム~滅びの魔女と伝説の剣"的开场短片,音乐的主体部分替换为游戏CD中的OP.