Dragon Quest: Dai no Daibouken

Before his adventure begins, Dai lives in peace as the lone human among monsters on Dermline Island. While he dreams of becoming a hero, a group of fakes shows up to kidnap the Golden Metal Slime! Then, when Princess Leona arrives in need of a hero, Dai is ready to answer her call...but he needs more training! Will a tutor come along to help him?

(Source: VIZ Media)