Following a surge in popularity thanks to the Mobile Suit Gundam anime series, Gundam Plastic Models (Gunpla) experienced a decline before making a remarkable comeback fueled by Plavsky particles. These particles enable fans to engage in virtual battles using their Gunpla, culminating in the prestigious Gunpla World Tournament where the finest compete. Sei Iori, inspired by his father's past success in the tournament, aspires to claim victory himself. Despite his exceptional skills in building Gunpla, Sei struggles in combat. Enter Reiji, a enigmatic youth with remarkable battle prowess but little knowledge of the world. Together, Sei and Reiji combine their talents to dominate the competition and revolutionize the Gunpla scene.