Hentai Kamen (released as HK: Forbidden Super Hero internationally[2]) is a 2013 Japanese superhero comedy film written and directed by Yūichi Fukuda [ja], starring Ryohei Suzuki in the title role and based on the manga series Kyūkyoku!!

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.

However, Kyosuke battles with his new identity as despite his new abilities, he struggles to accept that he might actually be so perverted as to gain powers through wearing used women's panties.

Kyosuke and Aiko arrive at their martial arts club to find all members defeated by the new transfer student, Tamao Ogane.

It was then the Goody Two-shoes Division appeared and began beating people for violating school codes.

After taking Aiko to safety, Kyosuke became Hentai Kamen and fought Goody Two-shoes Man.

However, Hentai Kamen found pleasure in the beating and Goody Two-shoes man became unhinged and lost the fight to Kyosuke.

During this time, a new pervert is on the loose and looks very similar to Hentai Kamen and has been randomly sexually harassing people on the streets.

Destroying Kyosuke's credibility, the copycat is character assassinating Hentai Kamen and now the public thinks he is not a hero, but just a true pervert.

Able to draw his perverted powers from this new feeling, Kyosuke restored himself as Hentai Kamen and defeated Tamao in combat.

Aiko has been emotionally confused as she have feelings for both Kyosuke and Hentai Kamen, but knowing they are the same person explains recent events.

"[10] Twitch Film awarded it a similarly positive review, saying: "HK: Hentai Kamen has its flaws but it's a big, colourful, bizarre comedy that is a lot of fun and has enough effective visual jokes to make it well worth a watch, if only for its novelty value.