The significance of money cannot be overstated; it is power, and life is meaningless without it. For Kimimaro Yoga, a second-year economics university student in a country with a failing economy, this is a painful reality he reckons with daily. He is surrounded by the seeming opulence of his peers while struggling to make ends meet. One fateful night, a mysterious stranger donning a top hat interrupts his life. The man, who goes by the name Masakaki, urges Yoga to come to the Eastern Financial District. It is a place where one can amass great wealth if they put up their "future" as collateral. Initially, Yoga hesitates, but his ambition and greed get the better of him, and he agrees to become an Entre. He is unaware that this world of opulence is another realm akin to his; one where Entres engage weekly in duels known as Deals, and everything they put up as collateral is at risk. Faced with the harsh reality of this new world, Yoga must adapt quickly if he hopes to safeguard his fortune and future, and also come to understand the true worth of money.