Gundam Build Fighters

An epilogue to season one, in the form a letter from China to Yuuma.

Sei Iori is a talented Gunpla builder, but lacks the confidence to become an effective fighter in a Gunpla Battle. One day, he meets Reiji, a mysterious red-haired boy, who displays his exceptional skills as a Gunpla Fighter by defeating Susumu Sazaki with Sei's newly constructed Build Strike Gundam.

As Reiji copes with adjusting to Tokyo life, he picks a fight with school council member Monta Gonda. Sei and Reiji defeat Gonda in an exhibition Gunpla Battle, but are immediately bested by Tatsuya Yuuki and his Zaku Amazing.

Sei completes an upgrade to the Build Strike Gundam while Mr. Ral gives Reiji an orientation on Gunpla Battle.

Fumina Hoshino, president of the Seiho Academy's Gunpla Battle Club, is flustered. Since she is currently the Battle Club's only member, it won't be able to enter the Gunpla Battle Japanese Under-19 Championship, which requires teams of three. Then Fumina meets a transfer student named Sekai Kamiki, a master of the Jigen Haoh school of martial arts. She immediately recruits him for the Battle Club. Sekai, using a Dom that he unexpectedly discovers in the club room, is taken in by the appeal of Gunpla Battle. Then Daiki Miyaga, the president of the Plastic Model Club who has been trying to recruit Fumina, appears and proposes a battle. Even though it's his first time, Sekai uses his Jigen Haoh martial arts to crush Miyaga's machine. But then the gifted young builder Yuuma Kousaka, Fumina's childhood friend, interrupts with his Lightning Gundam!

Having transferred to the Seiho Academy, Sekai discovers that he and Yuuma are in the same class. He challenges Yuuma to a battle but is bluntly rejected. Meanwhile, the school's student council has decided to merge the Gunpla Battle Club with the Plastic Model Club. To survive on its own, the Battle Club must defeat the Plamo Club in battle, and Yuuma is among the latter's players. With the Battle Club facing three-to-two odds, the battle seems like a mere formality, but Fumina's tactics let them put up a good fight. Miyaga loses his temper and deploys the huge mobile armor Agrissa, finally backing Fumina into a corner. But Yuuma, unable to accept that his club president is trying to win by ignoring the previously agreed rules, teams up with Sekai to destroy Miyaga's Agrissa. Thus, with the addition of Yuuma, team Try Fighters is finally formed!

Having transferred to the Seiho Academy, Sekai discovers that he and Yuuma are in the same class. He challenges Yuuma to a battle but is bluntly rejected. Meanwhile, the school's student council has decided to merge the Gunpla Battle Club with the Plastic Model Club. To survive on its own, the Battle Club must defeat the Plamo Club in battle, and Yuuma is among the latter's players. With the Battle Club facing three-to-two odds, the battle seems like a mere formality, but Fumina's tactics let them put up a good fight. Miyaga loses his temper and deploys the huge mobile armor Agrissa, finally backing Fumina into a corner. But Yuuma, unable to accept that his club president is trying to win by ignoring the previously agreed rules, teams up with Sekai to destroy Miyaga's Agrissa. Thus, with the addition of Yuuma, team Try Fighters is finally formed!