Keisuke is a timid and nerdy high-school teacher by day, and a leather clad rapist "superhero" by night. One day, one of Keisuke's students is found dead, and her death is ruled an accident. Keisuke and the girl's mother don't believe her death to be accidental – and upon investigation, Keisuke and Uncle Shotoku unknowingly delve into an underground world of shady cops, scummy drug dealers, corrupt teachers, and a rape-porn ring. Of course, with Rapeman's upstanding moral values, he must do something to avenge the young student's death, bring down the criminals and right wrongs through penetration!
Yasuji Hajima runs a butcher shop. When he was younger, he was just as interested in the sex as the next man but lately he has a hard time satisfying his wife who is still oversexed at her age. The Hajimas have one son, Shuichi, who is studying to enter Tokyo University. It is after he sees his parents acting in which he considers an odious manner that he changes entirely and raises the roof in every whichever way.
Hirobe is a lonely man. After witnessing her girlfriend die with a terminal illness, he wanders through the city like a shadow. One day, he meets Masako and they begin an affair. Masako is in an unhappy marriage with Yazawa, who is also cheating on her with a younger lover. The tension builds up to an unforgiving, yet quiet climax...
