Amalgam decides it's time to get serious about its Mithril problem, and this means big challenges are on the horizon for Sousuke, Kaname, and Tessa. As enemies close in on all fronts, will they find ways to overcome those challenges?

In Tokyo, Sousuke and Kaname flee from enemy agents in a desperate attempt to rendezvous with their allies. On Merida Island, Mithril struggles to respond to a fierce and demoralizing assault by Amalgam forces.

The SRT team has its hands more than full trying to protect Merida Island from three rampaging Behemoths. Sousuke and Kaname attempt to deal with their own frantic situation, as Amalgam's Kurama drags the students of Jindai High School into the fray.

Sousuke and Kaname work together to save Kyoko and everyone else at Jindai High, and they both reach a point where they must make difficult, fateful decisions. Tessa likewise tries to save as many of her people as possible as she abandons the island base.

Sousuke makes his way to the city of Namsac, where people bet on fighting matches between decommissioned Arm Slaves. Thanks to a bit of serendipity, he meets a team owner named Nami at the arena just when she's looking for an AS operator.

While enjoying considerable success fighting in the arena for Nami's team, Sousuke starts to grow accustomed to his new life in Namsac. But little things keep reminding him he came to this city with a specific purpose in mind.

The Crossbow team takes part in their first illegal battle, but nefarious forces are at work behind the scenes. If Sousuke doesn't play his cards right, this first battle could end up being his last.

Sousuke's grudge against Kurama escalates into a full-blown shooting war on the streets of Namsac, but is it possible for him to fight this war all by himself? And every war has its share of casualties.

When Tessa is found wandering dazed and barefoot on a California highway, her attending psychiatrist just might be in for the case of a lifetime. The story Tessa tells sounds like an intricate delusion, but sometimes truth is stranger than fiction.

Sousuke who are attacked by amalgam. Raids also come closer to Sousuke who cannot heal wounds yet. On the other hand, Tessa who missed Fowler slightly afterward pledges Leonard and amalgam.

Lemon determines where Kaname is likely being held captive, so Sousuke and his ragtag group launch a rescue mission. But many forces are on the move this stormy night, and the mission doesn't quite go according to plan.

Leonard and Kalinin make every effort to spirit Kaname away before Sousuke can reach her. As battle erupts between rival Amalgam factions and Mithril remnants, Sousuke and Kaname both find they have to fight against fate to hold on to hope.

Kaname, Sousuke, and the gang use summer break as an opportunity to visit the Narushino military festival, and during the annual AS competition, Sousuke helps give the underdog an advantage.

Sagara and Kaname barely escapes from the enemy. Now on the run they try to find a way out. Deep in the forest Sagara isn't able to move much more with his injuries, so Kaname decides to stop and rest for a bit. After Sagara was able to stop the bleeding, Kaname realizes how dangerous and mysterious Sagara really is. To make matters worse they find an unexpected person along the way, it's Kurtz, who looks badly beaten by Gaul. As the 3 try to make to the shoreline they find themselves in a tight pinch; the forest ended and all there is now is plain fields. Not Knowing what to do Sagara had only one idea left - to have himself and Kurtz distract the enemy force while Kaname makes a run to safety. But Kaname refuses to leave.

Tessa and Mao decide the best way to settle a big argument is with an AS battle! While Mao is calm and composed, Tessa desperately seeks training from Sousuke.

Sousuke is set on his mission to protect Kaname, and attacks anything vaguely resembling a threat to Kaname. This leads to funny situations and Sousuke has to explain Kaname why he is following her, blaming coincidence.

Sousuke gets oriented in his Garbage Duty and Kurtz gets to know the targets a little better. Meanwhile Tessa takes care of a research center in Russia. Sousuke's team encounter a mysterious man climbing to Kaname's balcony.

Sousuke suddenly decides to become Mizuki’s boyfriend! The cold, watchful eyes of Mizuki's friends settle firmly on Sagara - but it’s Kaname’s reaction he should be worrying about.

Sousuke spends most of the budget for the school festival. Kaname gets so disappointed. It might have been his apology? He invites her to "go to a southern island", but the destination is not what she is thinking...

Kaname and Tessa are taken away! The gang follows the signal transmitted by Kaname’s bracelet to find them, but upon reaching their destination, they’re surrounded by the authorities.

The Mithril assault team finally begins to take Sousuke's advice into account, but it may be too late: Gauron has one of Sousuke's old comrades predicting what Sousuke will do.

Kaname holds the ship together while Gauron and Sousuke face off. The problem is that Gauron knows he is beaten one way or the other. He plans to take everyone down with him.

Sousuke comes to Kaname's rescue, and the rest of the rescue team arrives on the scene as well, but can they hold off the army and save the students? Can Sousuke get Kaname to safety?

Kaname is in a bad mood after seeing Tessa emerge from the bath. Unfortunately, even as Sousuke Sagara tries to explain that things aren’t what they seem, Tessa finds a way to make the situation worse.

After learning that Gauron is still alive, Sousuke is ordered to join the Gauron Assassination Team. As he prepares for the mission, he has no idea the effect his actions will have on Tessa and Kaname.