Hull and Taiga are fascinated by XB and decide to join Minato Tribe. The two learn the rules of XB from the deputy leader Saori Arisugawa, but Taiga, who is not good at studying, is not good at it. Kamiya, who was watching the situation, proposes a practice game, saying, “It is faster to actually play.”Meanwhile, at that time, King Neo Tokyo’s Ho-Oh Tenshin had given a certain order to Chiyoda Tribe, led by his successor, Ho-Oh Jiro.

At an overwhelming speed, Ojiro of Chiyoda Tribe is overwhelming the powerful tribes one after another. His next target was Minato Tribe, led by the strongest XB player, Shun Kamiya. Kamiya cuts off Ojiro’s idea of ​​affirming blood and violence as a bad hobby … Thus, the battle between Minato and Chiyoda is cut off.

A member of Minato who is defeated by Ojiro and despairs. The life of the tribe was disbanded, and my body and soul were about to fall apart. At that point, an incident occurred in which Arisugawa was kidnapped by Hyakutaro Senju of Adachi Tribe. The remaining Minato members are confused, but head to Adachi City to help Arisugawa.

After the battle with Minato, Senju had another unpleasant existence. He is Chiyoda’s King Jiro, who is crushing the tribes in Neo Tokyo. Senju decides to hit Chiyoda. Haru and his friends, who once lost the battle with Chiyoda and know their abilities, try to stop the battle because they are worried about Senju.