A meteor struck Mamoru when he was a kid, but he didn't get injured at all. That's why he was called "Miracle Meteor Boy". Seven years later, two beautiful girls surrounded by noble aura suddenly captured Mamoru and he was taken to a strange place. Yes, it's inside a spaceship and there he can see even more beautiful girls with their panties exposed as if it's a matter of course...

"Show the Sacred Orb." He doesn't know what are they talking about. According to them, they are alien princesses from the Arcadare planet, and they came to Earth to get the "Sacred Orb", which is a key item of succession battle for the throne. Showing the panties is also a proof of the royal family and the pride of the Great Universe. When they checked Mamoru's body, the Sacred Orb was found dissolved in his body. As a matter of fact, the meteor which struck him was turned out to be the Sacred Orb. And if he do not extract it by his next birthday, then Mamoru will turn into a girl. To get it out, he needs to reach a very strong orgasm. Like this, a battle for the Orb begins...

[Modified from ErogeShop]