Following the rejection of their proposal to establish an official student magic club, Hiroko Takashiro, Saki Shidou, and Rie Morita are compelled to practice witchcraft solely during their spare time. One day, Rie stumbles upon a dusty, handwritten book. Discovered in a sales pile at an antique shop, the manuscript appears to be nothing more than a foreign curiosity. After translating the text, the girls uncover simple spells intended to bend an unsuspecting victim to the user's will and impose sexual desires upon them. Recognizing they have acquired a powerful tool, the group starts fulfilling various requests from other students—whether for love, vengeance, or sexual gratification. As the situation spirals out of control, the magic club gradually evolves into a cult centered on blood, lust, and human sacrifice.