In order to fight against the mysterious "Penguin Empire" from interfering world peace, secret organization "Prince Beauty Parlor" has developed a giant robot that powered by a rare special energy source called "Hi-ERo particles." Organization member Kyōko Sonan has located an ordinary high school student Kōichi Madanbashi with high amount of Hi-ERo particles within his body, making him a suitable candidate for the pilot of the giant robot, but there is only one way to release it: allow Madanbashi to harass her with lewd behavior.