Kazuma and his lover, Anna, set out to visit her relatives, the Kawarasaki family, whose luxurious mansion is located far away in the mountains. All the inhabitants of the mansion were into perverted sexual pleasures. When Kazuma saw the beautiful maid Suzune being trained as a sex slave, he had strange perverse desires. He never would have imagined that this two-day trip would turn into the worst nightmare of his life.