因為這個系列都沒有作者 所以好奇就找了一下這些歌的資料
SeasonⅠ Executioner
song: Executioner -神託を告げる者
artist: YDK
album: Perfect Square
SeasonⅡ Oriental Wind
song: Oriental Wind
artist: YDK
album: Perfect Square
SeasonⅢ blending rotation
song: blending rotation
artist: ぐっちりーに
album: projectΓ 2006 disc 3 未来 -prospect-
SeasonⅣ Scarlet Blow
song: Scarlet Blow
artist: Tsukasa
album: projectΓ 2006 disc 3 未来 -prospect-
SeasonⅤ Bloody Brand
song: Bloody Brand
artist: Jun.A
album: projectΓ 2006 disc 1 過去 -past-
SeasonⅥ Reflection
song: Reflection
artist: 羽鳥風画
album: projectΓ 2006 disc 2 現在 -present-
SeasonⅦ Air Trancer
song: Air Trancer
artist: YDK
album: projectΓ 2006 disc 1 過去 -past-
SeasonⅧ Over the sky
song: over the sky
artist: 如月 柊一
alubm: projectΓ 2006 disc 2 現在 -present-
SeasonⅨ Where...
song: Where...
artist: YDK