Title: GM's Letters
Family Name: Cobayashi
Region (NA/EU): N/A
The item was an April fools joke. The confusion was intended in this case.
Yeah they should delete these items after the events expires.
I would prefer that items not be deleted, I collect. Adding more specific information to the letters would be a plus. As for being led to an old place, that's part of what's being collected. Leave them alone, just add information. OP was not asking for deletion.