Ayaka

Yanagi Yukito is an orphan who one day encounters an eccentric disciple of his father's. The strange man takes him to his birthplace on Ayakajima, made up of seven islands where mysterious beings called "Mitama" and dragons are rumored to reside. There, Yukito meets his father's two other disciples, who protect the harmony of Ayakajima... which soon threatens to collapse. (Source: Crunchyroll)