"I see how I'm going to win..." "I'll overcome him this time, so come at me again... accept! 'Bloom, gambler of souls!'" The value of a person in New Kyoto, a city ruled by the "King," is decided by his or her ability in the Build Divide trading card game. Rumors abound about New Kyoto and its ruler. "Any desire will be granted if you beat the King in Build Divide." In order to confront the King, one must engage in the TCG combat known as Rebuild, and the "Key" must be accomplished. Everyone has a desire that they would want to see come true. Teruto Kurabe, a young man who aims to overthrow the King, and Sakura Banka, the mysterious girl who accompanies him, commit themselves.