MAZE☆Bakunetsu Jikuu

Maze the Megaburst Space (MAZE☆爆熱時空, Meizu Bakunetsu Jikū) is a fantasy light novel series written by Satoru Akahori. It was released as an OVA before the anime series and the movie, with both the OVA and anime licensed in North America by Central Park Media and released on DVD under their Software Sculptors label.

Plot
Maze wakes up in her house, everything is a wreck and she has amnesia. Before she can gather what has happened the girl Mill storms into her house thanking her for having saved her life. She tells Maze that her house suddenly fell down from the sky and crushed Mills pursuers under it. However, before long they are both on the run from further pursuers who want their hands on princess Mill. They are only saved when Maze discovers that she has phantom light magical powers and can summon Mills family heirloom mecha. However, her performance with the mecha is weak; that is until the sun goes down and she is turned in to a lecherous man. Soon other travelers join them as Maze tries to protect Mill and figure out what she is doing in this fantasy world.

Other Sources

 * (Anime)