Galopoula's assault finally commences.

Gatlin, Ratarikov and Wen Sō manage to infiltrate HQ, but Border knows their goal thanks to Yūichi Jin's predictions, and positions the top 4 attackers to protect the expedition ship.

Kuroe and Kitora, along with Sasamori and Tsuji, form duos to take down the ace Idras, but Yomi deduces how Idaten works to intercept Kuroe's attack, injuring her in the process. Meanwhile, Miwa and Yoneya take care of Koskero with Jin's help, while Nasu and Kumagai defeat Wen Sō with Kikuchihara's aid.

The invasion concludes with Border being able to prevent the invaders from destroying the Expedition Ship. Kazama defeats Ratarikov, Konami defeats Gatlin with assistance from Tachikawa's torso, and Kō blocks Gatlin's last attempt at destroying the Expedition Ship. Elsewhere, Hyuse's attempt to board Galopoula's ship ends unfruitfully.

B-class rank battle ROUND5 / night section where Tamaki No. 2, Katori Corps, and Kakizaki Corps collide. The second new tactic of Tamaki awaits Katori, the captain of Katori, Ace, who attacked Yushin soon after the start of the game, and Wakamura and Miura, who follow him. The Katori corps suffers painful damage from the combination of the wire trigger "Spider" that Osamu learned from Kitora, Yushin's high-speed maneuvering, and Chika equipped with a lead bullet (Red Bullet) in Lightning. Although the Kakizaki corps, which had been cautious from the beginning, entered the war, the three-way battle remained in a stalemate. What is Tamaki's second next move to overcome this situation? ??

Chika's ibis finally explodes in the stalemate B-rank battle ROUND5 / night section. The Kakizaki Corps and Katori Corps, who have no way of shooting Chika, develop a linked strategy and attack the wire zone where they have been trained. The Kakizaki corps attacks the area where Yuma waits, and the Katori corps attacks the area where Osamu waits. Each looks like 3 to 1, but with the addition of Chika, who is in a position to aim for sniping in both areas, the situation is actually 3 to 2. In a situation that seems to be numerically disadvantageous, Tamaki's second new tactic shows its true value.

Osamu, who faces the Katori corps, defeats Wakamura in a battle using the wire trigger "Spider", and also drops Miura in cooperation with Yuma who has rushed. By the two trainees, Tamaki's second run alone at once. Memories of the past are revived in the mind of Katori, who was forced into a difficult battle situation. On the other hand, it seemed that Chika, who greeted Teruya, the only survivor of the Kakizaki Corps, had won, but Chika escaped urgently (ruby: bailout) in response to Teruya's tenacious counterattack. The whereabouts of the battle were left to Yuma and Osamu.

ROUND5, a B-rank battle, ended with the second victory of Tamaki, who made a big leap from the defeat in ROUND4. That night, at the Tamaki branch, which is pleased with the victory, Hughes offers to join Tamaki No. 2 with certain conditions for mastery. The condition was to deliver myself to my home country, Aftkrattle. The members of the Tamaki branch can't hide their surprise from the sudden offer. It is certain that joining Hughes will be a great force, but for that purpose, we must first convince the upper borders. The next day, the second member of Tamaki and Hughes head to the border headquarters where Commander Kido and other senior executives await ...! ??

Osamu, Yuma, and Chika who engage Hughes in the upper ranks of the border. However, the upper management is reluctant to join Hughes, who is a neighbor who once invaded Sanmon City and refuses to provide information and has a non-cooperative attitude toward the border. However, Osamu insists on the value of Hughes on the expedition as a guide to the unknown world of the near world (neighborhood). Commander Kido offers a deal on the condition that he takes Chika, who has a huge trion, to the expedition regarding Hughes' enlistment. Osamu couldn't hide his upset, but Chika accepted the conditions with a calm attitude and the deal was concluded. Then, ROUND6, where the B-class high-ranking Tamaki No. 2, Ikoma Corps, and Prince Corps collide, was about to begin ...

Class B rank battle, ROUND6 started! From the beginning, the Prince Corps / Kashio and the Ikoma Corps / Minamizawa approach Osamu while the wire is being stretched, but they use their wits to hit the Ikoma Corps and the Prince Corps. At one point, Ikoma Corps Minamizawa seemed to be dominant, but due to the cooperation between Prince Corps Kurauchi and Kashio, Minamizawa escaped urgently (bailout), and it was the Prince Corps that scored the first goal, but Yuma took the opportunity to be the Prince. Launch a surprise attack on the corps! !!

Three members of the prince corps confront Yuma who launched a surprise attack. Ikoma, aiming at both, shoots a deadly whirlpool arc moon! In the midst of a three-unit battle centered on the attackers, the two princes who were dropped in the warehouse leave the front line. Ikoma VS Yuma who collides, and the prince corps aiming for Chika, Osamu who moves to follow it ... Can Tamaki No. 2 seize the chance in front of the prince corps with the ability of B class high rank, Ikoma corps! ?? ROUND 6 is finally in the final stage! !! !!

The battle between Yuma, Ikoma, and the prince's attackers does not yield to each other. Chika supports Yuma, but the movement is blocked by the sniper Oki of the Ikoma Corps. In a turbulent battle, Yuma wins the battle with the prince and collaborates with Chika to drop the Oki Islands. Immediately after, Ikoma, who was reading Yuma's movements, fired a whirlpool arc moon and Yuma made an emergency escape (bailout), but due to the difference in points, Tamaki No. 2 won the B-class rank battle ROUND6. On the other hand, Hughes succeeded in being promoted to Class B without difficulty on the first day of joining the border. Tamaki No. 2, which Hughes officially joined, started.