The final round of the Gunpla Battle Japanese Championship’s national tournament has ended in a victory for the Try Fighters. After the finals, Sekai suddenly leaves on a training trip. A few days later, the Gunpla builder’s contest known as the Meijin Cup begins. At the venue, Fumina meets up with Mr. Ral and with Yuuma, who has come for a Gunpla building showdown with Minato. Many of the rivals they previously fought in the regional qualifiers and the national tournament have also gathered here. The Meijin Cup awards ceremony begins, and Yuuma’s entry wins the Open Course category. As Fumina congratulates Yuuma on his prize, Sekai returns from his training trip. Meanwhile Minato, who refuses to accept the results of the judging, raises an objection to the Meijin. In response, the Meijin activates the Gunpla Battle system to that the two contestants can settle their dispute.