Even Given the Worthless "Appraiser" Class, I'm Actually the Strongest 4

After defeating the possessed Zoid, Ein returns to his quest to locate the remaining World Tree spirits. His search takes him to the Forbidden Library, where he meets a mysterious girl… Meanwhile, there are rumors of demons in the Rayshik domain, and when Guildmaster Meegan asks Ein to look into it, he has no idea what he’s getting himself into…