An elaborate and brutal trap awaits Koharu, designed specifically to break her. Tight ropes wear away at her reason as orgasmic pleasure pushes her toward total submission. Dubbed the strongest female agent and unbeatable in both gunfights and hand-to-hand combat, Koharu finally lets down her guard after falling in love with a young adult man. Her happiness is shattered when the criminal organization Black Dog kidnaps her boyfriend. She storms their base alone, only to be captured and subjected to extreme brainwashing. She finds an opening and escapes, risking her life to rescue her lover—but the moment she frees him, he reveals his true identity...