Deatte 5-byou de Battle

Akira Shiroyanagi loves games more than almost anything, so when a mysterious woman named Mion abducts him and announces that he has been placed in a combat experiment, he reacts less like a victim than his captors expect. Participants receive special abilities and are forced into battles that can become lethal. Akira's own power is unusually psychological: it becomes whatever his opponent believes it to be. Instead of relying on brute force, he turns information, deception, and the way other people think into weapons. His goal is not merely to survive the next round. He wants to understand the organization running the experiments and find a way to turn its own rules against it.