Eiko is an alien girl with a unique superpower. She can sense when a man or a monster is out to rape her and take her virginity. She can transform into a superhero, Star Virgin, and use her super powers to destroy anyone out to take her chastity. Star Virgin never wears more than a small bikini and a headdress. Along with keeping her virginity, Eriko has to save the world from killer robots and spend time with her nerdy boyfriend.