The web manga focuses on Bojji, a deaf prince lacking any power, who is unable to even handle a child's sword. As the eldest son, he works diligently and aspires to become the world's greatest king. Nevertheless, people whisper behind his back, calling him "a good-for-nothing prince" and saying, "no way he can be king." Bojji manages to make his first friend, "Kage" (shadow)—a literal shadow on the ground who somehow understands Bojji well. (Kage is a survivor of the Kage assassin clan, which was nearly wiped out. No longer a killer, Kage now survives by stealing.) The narrative tracks Bojji's coming-of-age journey as he encounters various individuals in his life, beginning with his fateful meeting with Kage.