: These are popular for displaying official art. You can often find them on sites like Goods Republic , which lists various official Japanese merch including character-themed folders.
: While often made of tinplate, manufacturers like Contents Seed produce character badges that are frequently packaged with high-quality cardstock backing. Go to product viewer dialog for this item. Ningen Fushin no Boukensha tachi ga Sekai o Suk...
Ningen Fushin No Boukenshatachi Ga Sekai O Sukuu Youdesu Vol.1-6 Set : These are popular for displaying official art
: High-quality wall art and prints featuring the main party—Nick, Tiana, Zem, and Curran—are available through independent artist platforms like Redbubble . Go to product viewer dialog for this item
The most common "good paper" items are the official physical volumes.
Since this series is heavily centered around the characters' niche hobbies—like obsession with idols and Tiana’s love for gambling—there is a variety of official "paper" merchandise and printed media available. Manga and Light Novels
It sounds like you're looking for high-quality paper goods or the manga/light novel for ( Apparently, Disillusioned Adventurers Will Save the World ).