Mahiro Ichiki, a young woman married to her childhood friend and brother-like figure Taro, finds herself reluctantly agreeing to care for his younger brother Shiro after receiving word that he had been injured and would need assistance for a week. Despite her discomfort around Shiro and the tense atmosphere at her husband's family home, she feels compelled to help out. However, upon arrival, she discovers that Shiro's injury was merely a pretext for him to indulge in his perverted desires towards her. Unbeknownst to her, food prepared by Shiro's father contains drugs that render her helpless, and she becomes the unwilling victim of a depraved live chat session involving other men seeking pleasure from both young wives and mature women alike...