The series follows the tragic and sexually charged downfall of Kaho, a devoted girlfriend to Yusuke. Their pure relationship is shattered when the manipulative and wealthy Kanzaki sets his sights on her. The narrative begins with Kanzaki drugging Kaho and brutally raping her, capturing the entire violation on video to use as blackmail. Trapped and broken, Kaho is forced into a spiral of sexual submission. Each episode details a new, humiliating ordeal where Kanzaki forces her to engage in increasingly depraved acts. He makes her perform oral sex in public places, engages in rough anal sex, and forces her into orgies, all while her unsuspecting boyfriend Yusuke remains oblivious. The climax sees Kaho's spirit completely broken; she becomes a mindless sex slave, her body used and defiled repeatedly by Kanzaki, her love for Yusuke twisted into a memory of what she has lost as she is relentlessly filled with another man's seed.