Once upon a time, the Gunpla Battle world championship was held at the PPSE Stadium. After the Plavsky particle accident seven years ago, the damaged stadium was demolished, and a monument was placed there bearing the names of previous champions. Now, the Gunpla Battle Japanese Championship tournament is about to begin at the Yajima Stadium, which has been newly constructed next to this site. As champions gather from every prefecture, having fought their way through the regional qualifiers, Sekai again encounters Wilfrid Kijima of the Gunpla Academy. Meanwhile, Yuuma learns that Minato Sakai is also entering the tournament as one of the representatives from Osaka. The next day, brackets are drawn after the opening ceremonies, and the Try Fighters immediately enter battle as they are assigned the first match of the tournament. Their opponent is Okhotsk Academy, representing South Hokkaido, a team that placed in the best 8 of last year’s national tournament!