Yomu Tabi ni Shiawase wo!

In a post-apocalyptic world where civilization has fallen into decline, two girls go on a journey together. Mekuri, a girl who believes that "manga" is a history book of civilization, and Kiyoshi, a girl who doesn't believe in manga but can do manga-like things because of her superhuman strength, set out to decipher all the manga that exists.

(Source: Natalie, translated)