Sekai de Tadahitori no Mamono Tsukai: Tenshoku Shitara Maou ni Machigawaremashita
I’m the Only Monster Tamer in the World and Was Mistaken for the Demon Lord·世界でただ一人の魔物使い ～転職したら魔王に間違われました～
After completing a lengthy journey, Noa discovers the "Class Change Book." Seeking to escape the burdens of his "Hero" title, he uses it to switch to a new class: "Monster Tamer."
