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.
( episode director, assistant director) is directing the anime at , with as assistant director. (, 2019, ) is in charge of the series scripts. (, ) is designing the characters, while is the sub-character designer. Both are credited as chief animation directors. is the chief line director. , , and are the main animators. is composing the music.
is the art director, while is handling the art setting. is the color key artist. and are both compositing directors of photography. is editing. is the audio director, while is handling sound effects. is credited as animation producer.
will play the protagonist Bojji. will play Kage, a shadow that becomes Bojji's friend.
The other cast members include:
- as Daida, Bojji's half-brother
- as Hilling, Daida's mother
- as Domas, Bojji's swordmaster
- as Bebin, Daida's swordmaster
- as Apis, "the king's spear" and loyal man-at-arms
- as Drusi, Hilling's bodyguard and shieldbearer
- as Hokuro, a footman that looks up to Bojji
- as Boss, the ruler of the Boss Kingdom, and Bojji and Daida's father
- as Shiina, Bojji's late mother and the former queen
- as the Magic Mirror who secretly advises Daida
- as Death-har, the king of the afterlife
- as Death-par, Death-har's little brother