Two years have passed since the EL-Divers incident, and the popularity of the game Gunpla Battle Nexus Online (GBN) has continued to skyrocket. With the addition of exciting new features such as missions and story events, the GBN experience is more immersive than ever before. Amidst the player base, a user known as Hiroto Kuga has been gaining notoriety for his top-notch skills. Through a series of coincidences, Hiroto meets three other players: the boastful Kazami Torimachi, the mysterious May, and the timid Parviz. Forming the BUILD DiVERS, the unlikely group sets on a story mission rumored to carry bountiful in-game rewards. Together, the BUILD DiVERS must confront their own weaknesses as they join arms in a journey that may very well transcend the existence of GBN itself.

Gunpla Battle Nexus Online (GBN) is a new network game that lets people enjoy a variety of missions using Gunpla in a virtual cyberspace dimension. Middle-school students Riku Mikami and Yukio Hidaka recruit their classmate Momoka Yashiro and dive together into this vast world. Becoming Divers, or inhabitants of GBN, they meet a mysterious girl named Sarah who has an amazing sensitivity to Gunpla. They begin playing alongside her, but... There are many other famous Divers, starting with Kyoya Kujo, the champion whom Riku admires. Multiple Divers can join to form a team called a force. Meanwhile, the game is disrupted by Mass-Divers who use unofficial tools called break decals. Through many encounters and experiences, Riku and his friends will build not only Gunpla, but their own adventures as well! (Source: Official Website)

One year after winning the Gunpla Battle National Championships, Team Try Fighters is invited by Yajima Trading to a remote island to test the company's new battle system. Sekai and Fumina arrive on the island, only to discover that Gyanko, Shia and Minato were also invited. Yuuma declines the offer as he is assisting Mirai on a photoshoot, only to realize that he and his teammates are on the same island. Meanwhile, the Nielsen Lab experience an anomaly when their new Plavsky particles form a giant crystal and cause Gunpla on the island to go out of control. The Gunpla Fighters must band together to stop the crystal from wreaking havoc on all Gunpla Battle Systems around the world. (Source: ANN)

The massive beam of light fired from Eldora's moon has completely shattered the BUILD DiVERS' conception of Gunpla Battle Nexus Online (GBN). This has forced Hiroto Kuga and his teammates to reevaluate their mission on Eldora now that they are faced with potentially very real consequences. Despite this, the BUILD DiVERS rejoin the fight against the One-Eyed to protect what they hold dear. In the battle that concerns the fate of both Earth and Eldora, sparks fly as Hiroto is forced to confront his past amidst the revelations of GBN's shocking secrets.