Saiyuki RELOAD: ZEROIN

Priest Genjo Sanzo and companions Cho Hakkai, Sha Gojyo, and Son Goku maintain their westward journey to stop the resurrection of the demon Gyoumao. As the reputation of the Sanzo Ikkou precedes them, they continue to fight demon assassins at every turn, but they must also deal with increasing tensions within their group in order to defeat a powerful enemy.

Humans and yokai, science and magic... all exist side-by-side on a peaceful continent free of all order and regulation, widely known as "Shangri-La." The balance there was shattered when the Minus Wave caused all the yokai on the continent to rampage, an event known as the "Calamity." Continuing their journey west to stop Gyumaoh's resurrection experiments, the root of all the evil on the continent, the Three Aspects are finally drawing closer to India. But the closer they get, the more pronounced the influence of the Calamity becomes, and the more intense their battles become.

The Sanzo Ikkou continues its westward journey, on a mission to prevent a demonic resurrection. As Genjo Sanzo, Cho Hakkai, Sha Gojyo, and Son Goku fight their way to their goal, their path is fraught with internal strife. When they encounter a formidable pair of adversaries from the west, the cohesion of the group -- and the fate of the mission -- may be at stake.

Taking place in the past it offers a view at the Saiyuki 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 "Saiyuki") and his decision to live in Gojyo's house.