Ranking of Kings, Japanese Anime TV Series 2021

Story:

Bojji is a deaf, powerless prince who cannot even wield a children’s sword.

As the firstborn son, he strives hard and dreams of becoming the world’s greatest king. However, people mutter about him behind his back as “a good-for-nothing prince” and “no way he can be king.” Bojji is able to make his first ever friend, “Kage”—a literal shadow on the ground who somehow understands Bojji well.

External link: Ofiicial Website