 Although tall and strong, he has little self-confidence or fighting skills.One day, a twist of fate leads him to a hostage situation involving the new transfer student, Aiko Himeno.During Kyosuke's infiltration to try to help save the hostages, he learns by chance that wearing women's used underwear on his face awakens the dormant powers of his dominatrix mother and, combined with the influence of his policeman father's strong sense of justice, transforms him into a superhero - Hentai Kamen.