Despite Matakara's protests, Arajin joins Siguma Squad to please Mahoro. Marito takes Arajin out and tells him that they're headed to a raunchy welcome party full of girls. When they arrive, Arajin discovers that the party is not at all what he imagined.

Siguma Squad goes to Minato Kai headquarters to avenge their injured comrades. The Minato side claims that their members were jumped by Siguma. Sensing something afoot, Matakara asks Mahoro and Arajin to persuade Marito to prevent an inevitable gang war.

Akutaro sees potential in Arajin and asks him to join NG BOYS. Arajin finds the offer tempting but is disturbed by the bloodthirsty look in the members' eyes. Matakara confronts Akutaro about the war being a set-up and is jailed so he cannot warn anyone.

Despite Matakara's efforts, the fight between Kenichiro and Marito begins. Taking advantage of their position, the NG BOYS enter the battle between Minato Kai and Siguma Squad. How will the war end, and what will happen to Arajin and Senya's training?

As Arajin keeps trying to capture Mahoro's heart, the injured Marito invites him to a "group date" at the beach. Arajin agrees and buffs up for the party. When the day comes, Arajin realizes that he was set to 'date' very different partners... in battle.

As the release date of Shinpo's brother, Mitsukuni, who has been in a juvenile detention center, approaches, Shinpo, along with Aran and his friends from the Minatokai, are busy preparing for his release. But then he receives a call...?!

Shinpo is devastated after losing his only living relative, his older brother Mitsukuni. What words does Ichiya, who has possessed Akutaro, whisper to him...?

After Akutaro warns Arajin that a Majin's goal is to take over his host's body, Senya disappears. Meanwhile, Ichiya commands Matakara to fight as many people as he can. Matakara's uncharacteristic brutality leads him to one very dangerous confrontation.

Matakara's violence is unstoppable after merging with Ichiya and defeating Marito. He demands that Kenichiro fight him one-on-one. Meanwhile, Mahoro waits anxiously for Marito to regain consciousness and Senya finally explains his true goals to Arajin.

The fate of two friendships hangs in the balance of one final, brutal showdown. Can Senya and Ichiya finally make peace with their past? And, more importantly, can Matakara and Arajin survive it?