To preserve the peaceful times of Paradise, the Astrostar must be cleansed by the Mamamega. This person is defended by her shrine maidens. Lilith has been selected to be a shrine maiden, and is given the task to select the other two. This goes awry when the young girl Rurubell wants to become one and others work from the shadows to sabotage both the cleansing and the coronation ceremony.

Meet Galan, a Russian spastic geek who`d do anything to be a real, live samurai. But that`s just an impossible dream... or is it? When his friend Natsu, who is a successor of Japanese emigrants family, gives him the gift of an ancient sword, strange events unfold, and even stranger people drop out of the sky to attack. Now Galan must overcome his ineptitude and join a bunch of beautiful women in a wacky romp through a kingdom that time forgot. Hey, what could be better?

Earth. The not too distant future. A city is miraculously reborn just sixteen years after being completely destroyed by a giant meteor. At the prestigious Graviton High School for Girls, two new students are introduced. A-ko and her ditzy sidekick, C-ko.