Mami readily responds to a sudden summons—it's proof of her loyalty to her "master," Nezumoto. To fulfill his desires, she naturally offers her body without hesitation. Yet deep within Mami lies a hidden side no one knows about. Returning home, she trembles with suppressed passion at the sight of a man waiting eagerly for her. And this man, too, addresses her as his "master." As these two relationships intertwine, where will her heart truly turn?