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)

Though Gundam Plastic Models, better known as Gunpla, exploded in popularity with the release of the anime series Mobile Suit Gundam, their presence faded before resurging with a new purpose. Through the power of Plavsky particles, fans are now able to pit their Gunpla against others in a virtual reality-style battle with the best competing at the annual Gunpla World Tournament. Sei Iori, whose father was a once finalist in the competition, dreams of one day conquering the contest himself. However, while Sei is an expert Gunpla builder, he lacks the prowess to effectively fight his creations during actual battle. In comes Reiji, a mysterious boy who is curiously ignorant of society but quickly demonstrates to Sei tremendous ability in Gunpla battles. The two boys decide to combine their strengths in order to sweep the Gunpla World Tournament and take the Gunpla world by storm.

When one space colony declared its independence from the Earth Federation, the devastating 7th Space War, an all-out war between Earth and space, resulted. The Federation responded to the Space Revolutionary Army with mobile suits, called Gundams. However, the Space Revolutionary forces played their trump card and dropped hundreds of space colonies onto the Earth, plunging the planet into a seven-year-long nuclear winter. The Federation collapsed, but the Space Revolutionary Army was unable to invade the Earth in the aftermath of the colony drop. Fifteen years have passed. The year is now After War 0015, and a New Federation has sprung up on Earth to restore order. In space, the colonial leaders have been rebuilding their own forces as well. By chance, fifteen-year-old Garrod Ran has discovered an old Federation mobile suit, the Gundam X, and now he uses it to help out the Vulture ship Freeden in its struggle to keep the powers that be from repeating the mistakes of the past.

In the year Regild Century 1014, an entire millennium has passed since the end of the fabled Universal Century, where legends like Amuro Ray and Char Aznable ruled the battlefield as ace mobile suit pilots. The Earth's surface that was once hotly contested is now mostly abandoned, with humanity preferring to live in space colonies and the surface of the moon. Capital Guard Academy student Bellri Zenam lives a peaceful academic life, but his normal days are brought to an end with the capture of pirate pilot Aida Surugan and her mobile suit G-Self. Bellri feels a strong mental connection with the G-Self and discovers that he is able to pilot it. He soon finds himself in contention with the Capital Guard, a radical faction that follows its own secret agenda despite the wishes of the Amerian Army, who still hold power on Earth. Joining the crew of the Amerian spaceship Megafauna, Bellri and Aida must pilot the G-Self to victory against the Capital Guard and its leaders, the charismatic Colonel Kunpa Rushita and the enigmatic Captain Mask.