From my (admittedly half-assed) research, this song is in bull-shit-ese, or as some fans like to call it, the "Golden Language". Somebody with more time on their hands has written this all up (in Japanese): http://www.pionet.co.jp/~shinji/nickey/2002/aurea.txt
i dont think this is the ending of the first game, i think its the ending for the 2nd game *aka the alternate world story* since it is showing characters that dont show up in the normal tsukihime storyline.