Subjected to relentless bullying, Aito Eyama faces a life filled with torment from his peers. Unexpectedly, an invitation to the enigmatic 'Captivity Game' falls into his hands, offering the chance to attain immense riches. Embracing the role of captor, Eyama selects his long-time tormentor, Aya Kirishima, as his captive. The game's premise is straightforward: the captor holds absolute power over the captive, except for the prohibition on murder, all while concealing their own identity to emerge victorious. With a secluded cell, legal immunity, and necessary provisions at his disposal, Eyama embarks on a path of vengeance and twisted justice against Aya. Amidst this cruel game, he crosses paths with other captors harboring their own ulterior motives. Simultaneously, Aya proves to be a resilient captive, determined to break free from her confines by any means necessary. Yet, her struggles risk awakening a dark side within Eyama, yearning to break free and wreak havoc upon the world.