In a ruined world remains only the Devil's Castle. There was an elf witch Nagi who was masturbating to kill time with machines found in a small room in the basement. When she was satisfied with all the machines, she remembered the existence of a ruined temple on the top floor of the demon's castle. There was a cloud buster secretly hiding a machine with incomparable amount of wickedness compared to the machine found in the underground small room. The Cloud Buster was a large machine that blew away stagnant clouds using orgone energy, and inside it contained machines used for rituals. Nagi got so fired up seeing the aggressive, torturing machine that she could die. When you free all the machines in this cloud buster, you'll get a hint to fix the ruined world. Nagi decided to dedicate her body to these machines.... The harsh, unforgiving, and nightmare-like machine masturbation begins.