Talk:Someday/guide/Crystals/@comment-26383442-20171114162607/@comment-32635934-20171114163144

When obtained, they reveal a part of Itsuki's backstory in the shape of journal entries. You can take another look at what they say inside one of the folders of the Computer World once you've collected them.

Just like Feats, they serve no other purpose than a 100% completion and backstory details.