The "Amazon Project" aimed to grow artificial life forms into humanoids, but an accident inside the research facility released 4000 test subjects with a preference for human-derived protein into the city.

The extermination squad is overwhelmed by the number of Amazons that turn up; Jin reveals the truth about himself to Haruka and declares that the Amazons must be hunted down.

Haruka, beginning to fear his inner beast, goes to his mother to find out more about his true identity and learns an unexpected truth about himself; the extermination squad rushes to the building where the signal from the test subject is originating.

Haruka and the extermination squad must barricade themselves in to hold back the horde of test subjects; Jin is led astray with false information; the more Haruka fights, the more the Amazon within him awakens.

Reika orders Haruka to return home, but he is hesitant to oblige; Shido and the rest of the extermination squad are fed up with waiting for Haruka to return; Mizuki decides to go to the Nozama Pharmaceutical Research Institute by herself.

Haruka rushes to Mizuki's aid and starts fighting with the test subjects, but he goes berserk during the battle and loses all sense of reason; he heads to Nozama Pharma to try to get the answers he needs from Jin.