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Perhaps more than any other filmmaker during the so-called First Wave of Japanese exploitation cinema, Koji Wakamatsu extended the country's tolerance for previously taboo subject matter, eventually leading to the extreme S&M and so-called "Ero-Gro" films of the 1970s and '80s. This film is no exception. Shot in less than a week in order to capitalize on the international publicity being given to Richard Speck's horrific murder of eight student nurses in a Chicago dormitory, there is a good deal of documentary footage of war protests framing the story of a young man who is invited to a nurses' dorm for some sexual fun. What the nurses don't know is that their guest is armed with a gun, and completely out of his mind. The expected murder and mayhem ensue, leavened with a great deal of leering Ero-Gro and a surprising amount of political moralizing about the evils of capitalism. The film was a huge success, leading Wakamatsu to continue exploring real-life crime in the same year's Nihon Boko Ankokushi Bogyakuma.