Spoilers
Apologies for digging this back up.
I’ve completed the true finale and am in the post-completion doors room (with the staff room available), however, the premium item unlock chest still doesn’t seem to do anything.
I tested this chest on a save file much further back (when I had 20 premium items) and it unlocked 2 items I didn’t have at the time, the rain stone and the box of gluttony. This save file already has other missable premium items such as the potted grace and rude’s final score, so I assume it unlocks everything that is listed as missable in the guide.
The items that I’m missing in this completed save file are the angel scarf and the flag of courage - could I ask for a patch that includes these items (or I suppose all of them?), or barring that, simply a save file that will allow me to view the true ending? I would greatly appreciate it, and thanks again for your hard work.