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!
Older, wiser but still a wandering loner, the blind, peace-loving masseur Ichi seeks a peaceful life in a rural village. When he's caught in the middle of a power struggle between two rival Yakuza clans, his reputation as a deadly defender of the innocent is put to the ultimate test in a series of sword-slashing showdowns.