Sei Iori is a Gunpla builder whose family runs a hobby shop in a small town. He aspires to be a Gunpla Battle champion like his father, but despite his exceptional building skills, he lacks the combat abilities to compete with other contestants. Then one day, he meets a mysterious boy named Reiji, who helps him improve his confidence in participating in Gunpla Battles. Together, Sei and Reiji battle their way to the 7th Gunpla Battle World Tournament.
A new Internet service has been born in the world of Gunpla. Within the Metaverse realm, the user can control their own avatar, interact with other users, play Gunpla Battle, and purchase actual Gunpla. Rio Hojo is a boy who has dived into this new world. Studying Gunpla building techniques in the real world with Seria Urutuski, and absorbing Gunpla Battle know-how from Mask Lady in the Metaverse world, he has been honing his skills day by day. After completing his own original Gunpla, the Lah Gundam, Rio happens to encounter some past champions of Gunpla Battle in the Metaverse realm.
The Gunpla Force Battle Tournament is a big event held in GBN once per year. Competing in the final round are Avalon, led by the champion Kyoya Kujo, and the elite 7th Panzer Division led by the cunning Rommel. Starting with Kyoya's Gundam AGE II Magnum, a variety of Gunpla take to the field to determine which is the strongest force!
Model Suit Gunpla Builders Beginning G is an original video animation series produced by Sunrise to celebrate the 30th anniversary of the Gundam plastic model kits. It's directed by Kou Matsuo and written by Yousuke Kuroda, and features character designs by Kaichiro Terada. The OVA was released in August 15, 2010 to December 19, 2010 with 3 15-minute Episodes. Unlike other Gundam titles, Gunpla Builders Beginning G takes place in a present-day timeline.
Aside to the OAV, two manga sequels were released in Dengeki Hobby Magazine.
In the heyday of e-sports, “Gunpla Battle” is leading the way in popularity. By scanning their own gunpla and controlling a life-size Gundam projection, they aim to win the national championship. Hiro is the pilot, Takumi is the builder, Kentaro is the programmer, Taichi is the commander, and Sota is the armorer. A variety of crises await these adolescents. Farewells from their friends and conflicts with rival teams. This is a coming-of-age ensemble drama about high school students who gradually grow up with dreams and friendship in their hearts through Gunpla battles.