Daidaiboshi

A long time ago, four powerful witches were sealed in a kingdom ruled by an enigmatic king. Legends claim that finding their graves grants any wish, no matter how impossible. Daidai, a girl who fled from the royal treasury, embarks on a journey through this magical land, guided by Matsuba, a boy-robot who is fond of her. The pair seeks the witches' resting place, though the true nature of their goal and the wish they hope to obtain remain unclear.