Nige Jouzu no Wakagimi

Set in feudal Japan in between the Kamakura and Muromachi periods, our hero Tokiyuki Hojo is a boy on the run that history all but forgot! When the Kamakura shogunate is overthrown by Takauji Ashikaga, Tokiyuki's family and standing are viciously taken away from him, and he must flee to the far reaches of the land to survive and seek out his revenge!

(Source: MANGA Plus, edited)