Oh this looks nice! It seems that the ones at the very end, and a few ones in the middle may be bad ends. But the rest looks like rewards to the player (in this case, enjoying monsters, or human). Ok, this looks like potential.
Just managed to buy a gift code (after buying the CG collection first) of this. Hopefully this can help the one doing this work. Any content with vanilla Harpies and Asuka are welcome (I will avoid the bad ends though)