: The manga adaptation features art by Masaki Kawakami and was collected in six tankōbon volumes. You can find full sets, like the Vol. 1-6 Manga Set at eBay - japan_comic_happy .
: This is the original source material written by Shinta Fuji and illustrated by Susumu Kuroi , with six volumes published under the MF Books imprint. Collectible Paper Goods Ningen Fushin no Boukensha tachi ga Sekai o Suk...
: High-quality wall art and prints featuring the main party—Nick, Tiana, Zem, and Curran—are available through independent artist platforms like Redbubble . : The manga adaptation features art by Masaki
For collectors, various retailers offer official paper-based merchandise: : This is the original source material written
It sounds like you're looking for high-quality paper goods or the manga/light novel for ( Apparently, Disillusioned Adventurers Will Save the World ).
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