If you have additional context (where you saw this, file extension, creator name, or approximate year), I can refine the investigation or help you reconstruct or locate the original material.
Should you recover the actual file or locate a reference, further analysis can be provided. Beasts in the Sun -Skeleton Test- -Animo Pron-
After thorough searching across academic databases, game archives, animation indexes, and cultural records (including AniDB, MyAnimeList, VNDB, and general web searches), If you have additional context (where you saw