Neo Kyoto is a city with an AR infrastructure and ruled by the King but is also a world where the social and economic status of a person is determined solely by their skills in a game called Build-Divide. One day, Teruto Kurabe is wandering around the city with a piece of bread in his hand, and discovers a girl named Sakura Banka who is being attacked by a thug, so he uses the power of a mysterious card in his possession to save her. Witnessing his powers, Sakura speculates that Teruto must be highly skilled in Build-Divide and requests a battle with him. She has been searching for a powerful player that could help her win through the Rebuild Battles, which would allow her to challenge the King. However, Teruto has lost all his memories…

After battling Teruto, Hiyori pleads to become Teruto’s disciple, and follows Teruto and Sakura around. In order to obtain more chips, Teruto and the crew head to a place which is rumored to be where Build-Divide players gather. However, before they arrive at the location, they discover that someone has already defeated all of the players, so they are forced to search in another area. On their way there, Teruto is pulled into a crowd of protestors and gets separated from Sakura and Hiyori. In the midst of the confusion, a young man named Naomitsu Enjo appears and helps Teruto. Naomitsu Enjo expresses his anger towards the system of Neo Kyoto and…