Humanity had invented fortified cardboard in the year 2046.The fortified cardboard had revolutionized the world market. It also served a greater purpose for reviving the cancelled distribution of the miniature hobby, Little Battlers Experience (LBXs). 3 years later,the story focuses on Ban Yamano who was LBX battling alongside his best friends, Kazuya Aoshima and Ami Kawamura in the 2050 LBXs World Tournament,Artemis .The episode goes back in time before the event, when Ban was on his way to the Kitajima Model Shop.There, he saw a rare, unscheduled released armor frame kit, Achilles. Despite his low allowance and his mother's objections against LBX, Ban wanted the kit very much. Before going home, Ban comes across a mysterious woman chased by 3 unknown pursuers. The woman gives Ban a mysterious metal suitcase without any instructions. It is later revealed to contain an LBX model, AX-00.