Katsuma is just a henchman of his female bosses... Whenever he does battle against Silva Star, a superhero, he loses...

One day, when he has another battle against Silva Star, his bosses suddenly spring a trap on Katsuma and Silva Star. When he regains his consciousness, he finds himself being taken care of by Maria, Silva Star's partner. Katsuma is attracted to her kindness... No, he just sleeps with her... However, he acquires a special power by sleeping with her...!

He soon decides to take revenge on his bosses...