The last collectible achievement I was missing. In this playthrough, I'll get the good ending since I got 100% completion for Lily, so in the next NG++, I'll only need to get Lily's "bad" ending. I got Adam's ending in the first NG.
I did it this way because I understand that the ending that doesn't require 100% completion for Lily is the quickest to obtain.
Posted by Life_Daikon_157