Sanshiro's chances of having an adventure are slim to none on his tiny island hometown. Until the day when a mysterious stranger invites him to play a game... Without warning, Sanshiro is taken to a reverse universe to play Bakégyamon--a game pitting monsters against monsters, with a twist. Along the way he meets other opponents who have their own reasons for being there. Namely, a wish that is granted to the winner of the game. But how far can Sanshiro get when the monsters he's been paired with are a bunch of little mud balls?!
Clearing each game with just moments to spare, Sanshiro meets other contestants who aren't as happy that he's succeeding. Mick will do anything to get ahead--lie, cheat, or steal. And he's out to take advantage of Sanshiro's trusting personality...