Mask of Zeguy

is a Japanese 2-episode OVA produced by KSS.

Plot
High school besties Miki and Sayaka were suddenly blasted into another world that connects to multiple time eras. Known historical characters via madmen plot the downfall of Earth and their leader, Himiko kidnaps Sayaka for her divine powers to open the World Gates (ゼガイの門). Now it's up to Miki to rescue Sayaka on a life-or-death quest to find the only power to stop the evil, it is that of the mysterious Mask of Zeguy.