Usogui doesn't care if you understand the game. It cares if you understand that Madarame has already won before the cards are dealt. Every gamble is psychological warfare disguised as parlor tricks, a man reading his opponent's soul while they think they're playing Old Maid. He bets his life not because he's desperate, but because he knows desperation is the only language that makes people honest. The real game isn't on the table. It's watching someone realize they've been playing a different game the entire time, against an opponent they can't see until it's over.

In the gambling underworld, some players go as far as wagering their own lives. To keep these deadly contests honest, a violent and powerful organization called Kakerou oversees them as a neutral referee. Baku Madarame, known as Usogui, the Lie Eater, faces unhinged opponents in games such as Escape the Abandoned Building, Old Maid and Hangman. His ultimate aim is to outplay Kakerou itself and seize control of the very body that polices these matches. This single-episode OVA is a psychological story built around high-stakes gambling.