Mask of Zeguy

Miki is a normal school girl until mysterious warriors appear to blast Miki into another dimension. She flees her captors only to find herself trapped in a world of monsters and madmen who plot the downfall of Earth. The only power that can possible save her and the world is that of the mysterious Mask of Zeguy. Miki must embark on a life-or-death quest for this talisman, with the villains who kidnapped in hot pursuit.

Young Miki and Sayaka, through a freak accident, somehow manage to stumble through one of the many dimensional rifts that connect the outside world with the kingdom of the clouds. Sayaka is quickly mistaken for the Priestess of Zeguy, and is kidnapped, leaving Miki to try and rescue her lest one of several powers snatches the power of Zeguy for himself. Oh, yeah, and did I mention that Miki is actually the Priestess...?