In the virtual world of Gunpla Battle Nexus Online (GBN), two middle-school students, Riku Mikami and Yukio Hidaka, along with their classmate Momoka Yashiro, embark on exciting missions using their Gunpla models. As they become immersed in this digital realm as 'Divers,' they cross paths with the Gunpla prodigy Sarah, whose exceptional skills captivate them. Alongside other renowned Divers like the esteemed champion Kyoya Kujo, Riku's idol, they can team up to create a powerful 'force.' However, their gaming adventures face a threat from Mass-Divers employing forbidden break decals. Through a series of encounters and challenges, Riku and his friends not only enhance their Gunpla but also craft unforgettable tales of their own.