The Gundam Build Fighters Zero (ガンダムビルドファイターズゼロ, Gandam Birudo Faitāzu Zero) is an Japanese science fiction anime television series based on Sunrise's long-running Gundam franchise.
During the childhood, Otori Bujin is an Japanese Gunpla Fighter with excellent building skills. Because of this, he gained the alias "The Ultimate Bujin Gunpla" after he were managed to win the Gunpla Battle World Championship. However, he was suddenly disappeared from the public, leaving his own family behind with his wife died of illness, leaving only his son and daughter remain in his family.
In the present day, Otori Ren, the son of The Ultimate Bujin Gunpla, who immediately gained his own name after 25 years, has decided to enter the next Gunpla Battle World Championship while attempt to search for his missing father.