Year 2031: Tokyo Area. Most of the human race has been wiped out by the parasitic Gastrea. Part of the Anti-Gastrea movement, high school student Satomi Rentaro works as a civil officer for Tendo Civil Securities. On a mission, he meets a suspicious man in a mask and a tuxedo: Hiruko Kagetane.

Enju is treated like an outcast at her school when it is found out that she is one of the Cursed Children, who have the Gastrea virus within them. Despite her sadness, they go look for the host Gastrea. She gives it her all and instantly is able to recover the case...

Hiruko instantly takes care of 29 civil officer pairs and comes face to face with Rentaro and Enju again. Rentaro shows his true power to Hiruko, proving that he's not the only one that was part of the New Human Creation Project and they battle again.

Rentaro gets hurt trying to protect Seitenshi from the sniper. The security plan that Seitenshi's bodyguards had set up were leaked to the sniper. Enju had gone after the sniper and falls into a coma.

The outdoor classroom is completely destroyed because of the bombing. Hope is starting to be destroyed along with the Monolith as the JASDF and Gastrea face off. However, the ones to show up at the civil officers' base were JASDF who had been turned into Gastrea themselves.