Nige Jouzu no Wakagimi

In the year 1333, the Kamakura shogunate government comes crumbling down. A trusted vassal, Ashikaga Takauji, betrays the shogunate and organizes a rebellion. Houjou Tokiyuki, the rightful heir, escapes the massacre with a Shinto priest named Suwa Yorishige to Kamakura. On the run and fighting to stay alive, Tokiyuki sets in motion his plan to reclaim his birthright.

(Source: Crunchyroll)