If you're looking for anime similar to Saiyuki OVA, you might like these titles.
1000 years in the future, both humans and Asubots were in a bleak of destruction because of a strange phenomenon called the Destruction virus. But a prophecy in the past could save the earth. Goku, a powerfull 1st generation Asubot and Sanzo, a youth from 1000 years met along with their friends to fullfil the prophecy and save the earth from the destruction virus and from Professor D before he destroys the earth.
A mysterious monkey-tailed boy named Goku teams up with a teenage computer-wiz girl named Bulma to search for the mystic Dragon Balls. According to legend, whoever collects all 7 Dragon Balls will have any one wish granted. Join Goku in this hilarious anime masterpiece, as he races and battles to save the world from the forces of darkness. Who will find the balls first?
Sumimura Yoshimori is a Kekkaishi – an inheritor of the power to battle demons, using barriers called kekkai. His family is charged with protecting the grounds of Karasumori high school, a building which magnifies the power of demons who enter it. Helping him are his spirit-wolf companion Madarao, and next door-neighbor Yukimura Tokine, the daughter of a rival clan. Years ago, Tokine was injured protecting Yoshimori, and now he is determined to become strong enough to keep her from being hurt again. Of course, he'd rather bake his exquisite cakes than have to fight demons at all, but fate has something else in store! As a shadowy demon organization moves to steal Karasumori's power, can Yoshimori overcome legions of demons, a centuries-old family rivalry, and a grandfather who just can't understand his love for baking?
Allen Walker is an exorcist working for the Black Order whose mission is to protect mankind from the evil Millennium Earl and his deadly Akuma. Allen and his comrades must recover lost Innocence while defending against the Earl's terrifying army. But if they fail, Innocence will be lost forever.
When his adopted father, Shiro Fujimoto was killed by his biological father, Satan, Rin Okumura swore to become an exorcist to avenge Shiro's death declaring war on his own blood-relatives of the underworld…Everyone is in the midst of preparing for a festival which is celebrated once every 11 years in True Cross Academy Town. However behind the scenes in the shadows, a "Phantom Train" goes berserk while the barriers protecting the town from demon intrusions were under repair. Rin, Yukio, and Shiemi are sent to exorcise the Phantom Train, but as usual Rin complicates the situation. Among all of the chaos, Rin meets a demon in the form of a young boy. Meanwhile, Cheng-Long Liu, a Senior Exorcist First Class from the Taiwan Branch joins Shura in the repair operation and the story takes an unexpected turn as all their fates cross.