The game of "Build Divide" in Neo Kyoto holds immense power, allowing players to settle personal disputes and determine social status. Winning the game is synonymous with success in life and the coveted position of the King, who holds unparalleled authority in the city. Teruto Kurabe finds himself in Neo Kyoto one day, armed only with his name and a deck of cards he can no longer remember how to use. Sakura Banka, a fellow player, helps him recollect the rules and reminds him of his ultimate goal - to meet the King. Together, they participate in the Rebuild tournament, competing for the opportunity to challenge the King for their throne by gathering twenty-one tokens from other players. As Teruto delves deeper into the game and recovers his memories, he begins to question the veracity of Neo Kyoto's reality.