 
 Everyday, the residents of Tachikawa city are under attack by alien criminals and mysterious monsters seeking to conquer, enslave and destroy. To combat these threats, a select group of individuals serve as protectors.

 
 Everyday, the residents of Tachikawa city are under attack by alien criminals and mysterious monsters seeking to conquer, enslave and destroy. To combat these threats, a select group of individuals serve as protectors.