
Beyond the Knuckle
Having recovered from his battle with Adou, Sekai heads for the Labs' workshop to repair the Build Burning Gundam, and encounters a mysterious girl. Thanks to the girl's advice, Sekai finishes repairing the Build Burning, and the next day he goes to the Labs' battle room with Mr. Ral for special training. There he meets Kei Karima from Honmoku Academy, representing Kanagawa, who suggests they play a practice match. His goal is to learn the strength of the Gunpla Academy, and when Sekai realizes this, he cannot hide his anger. At this point Wilfrid Kijima, the ace of the Gunpla Academy, intervenes, as does the Gabai Institute team that represents Kagoshima. It seems the situation will get out of hand, until Meijin Kawaguchi suddenly appears on top of the battle system. Thus begins a Battle Royal among representatives of each school, under the Meijin's supervision.
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More from this season

S2 E1
The Boy Who Calls the Wind
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!

S2 E2
Team Up, Try Fighters!
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!

S2 E3
Her Name Is Gyanko
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!

S2 E4
G-Muse
Having achieved their first victory in the practice match with Gyanko, the Try Fighters are training hard for the regional qualifiers which will be held in one month. Fumina is thinking of building a new mobile suit for use in the tournament, and when she confers with Mr. Ral, he suggests that she and Sekai take a trip to G-Muse. Here, Fumina virtually goes into a trance as she tries to choose a Gunpla, and Sekai is soon bored of watching her. A clerk encourages Sekai to build his first Gunpla, the Musha Godmaru, which he uses to battle some little kids. As Fumina rejoins him, they encounter Minato Sakai, a middle-school builder from Osaka. In the twinkling of an eye, Minato builds his own Kouki Gundam and begins a battle with Sekai. Thanks to his knowledge of SD Gundams' unique traits, Minato gives Sekai a hard fight and ultimately defeats him. But this battle has given Sekai and Fumina some valuable ideas for the tournament.