Kurea, feeling neglected by her indifferent husband, struggles with loneliness. One day, she reunites with her former classmate, Hagihara. He persuades her to take an aphrodisiac, and soon the drug courses through her body, igniting intense physical arousal and emotional confusion. That night, she ends up in a passionate affair with Hagihara. After that, he keeps visiting her, supplying more of the drug. Under its influence, Kurea's body becomes hypersensitive, trembling with each sensation as her desires grow uncontrollable, pulling her deeper into their illicit relationship. Soon, other former classmates get involved, escalating the sexual chaos. Kurea is consumed by a fate filled with taboo pleasure and overwhelming lust.