The story of Sanzo and his three companions in their quest to the west, to stop the resurrection of Gyuumao. On the way they are fighting youkai, getting into trouble and helping the townspeople.

Taking place in the past it offers a view at the Saiyuuki quartet before their formation and their journey to the west. First OVA starts with Sanzo and his master, also with Ukoku (known as a later Ni Jianyi). Second OVA shows first meeting of Goku and Sanzo. Third OVA considers the events after Hakkai's sins and his trial (that we know from first season of "Saiyuuki") and his decision to live in Gojyo's house.

Short theater manners animations shown before Hibike! Euphonium Movie: Todoketai Melody.

An OVA adaptation of the climactic part of Saiyuuki Gaiden.