Tormented by relentless bullying, Aito Eyama faces a twisted opportunity when he's invited to the enigmatic 'Captivity Game' offering immense riches. To partake, he must become a captor and select a victim to confine for a month. With no hesitation, Eyama picks Aya Kirishima, the leader of his tormentors. Bound by the game's rules, he indulges in his vengeful desires while concealing his identity to clinch victory. As Eyama grapples with his cruel acts and encounters fellow captors with their own motives, Aya challenges her role as a prisoner, triggering a dark side within Eyama itching to break free.