Seisenshi Dunbine OVA

Seven hundred years after Drake's war, most fighting machines have vanished from Byston Well, leaving only ancient remnants. Black knight Rabaan's attack on Baran Baran draws the young hunter Shion into a struggle over a hidden treasure and leaves him captive alongside Princess Remul.

An attempt to exploit him reveals the power of a sacred warrior. With the fairy Silky's help, Shion escapes and reaches the Aura Battler Sirbine, taking on the task of protecting Remul against ambitions that threaten to revive the dangers of the distant past.