So I watched season ten and something is missing for me. After the attack of the oni the ninja are thrown into a new mission and a new journes. New and old enemies. New and old places. TO prevent a war from coming they need o find a cure to save their friend and time was running out

Born as the child of a demon and a human, Asta never got to know These things. Saved from the demons clutches, Charlotte and Yami agree to raise the Boy as their own. They never planed on telling Asta the truth, giving him a peaceful and happy life. But the demon did promise that he would come back one day. They both hope to be Ready for that Moment.