A young girl named Aoyama Miki, also known as Sailor Sapphire, bears the sacred duty of upholding justice and is fated to battle lust demons. She has always chosen the path of righteousness, fighting relentlessly to foil evil conspiracies. However, her current enemy proves far more dangerous. Banba, the leader of the lust demons, plots to plunge Earth into a world of darkness. He threatens Miki's ally, Kuromi Reiko, and transforms her into a monster known as Karumi to torment Miki. As part of his scheme, Reiko appears before Sapphire in her monstrous form, leading to a fierce battle between the two. In the end, Sapphire is defeated and completely captured. She is then subjected to relentless lesbian torture at the hands of Karumi. This brutal confrontation and the emergence of a new, tormenting enemy deepen the unfolding story.