Nige Jouzu no Wakagimi S1.E1 ∙ 5-gatsu 22-nichi

The puppet heir Hojo meets a mysterious priest, Suwa, who predicts he will become a hero in two years. After the Kamakura shogunate falls in 24 days due to Ashikaga's betrayal, Suwa reappears, taking Hojo to Suwa for a legendary tag game.