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～ · Sekai de Tadahitori no Mamono Tsukai: Tenshoku Shitara Maou ni Machigawaremashita

MangaFinished🇯🇵 First published in 2018ActionAdventureFantasy

Norio Doujima story, art · Senri Kakei story

After a long journey, Noa finds the "Class Change Book." He's done to all to abandon his bothersome "Hero" role and gain a new class... "Monster Tamer."

Synopsis via AniList