Black Bullet

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.

Rentaro and President Kisara head to the Defense Ministry after being summoned. All of the reputable civil officers from the Tokyo Area show up there. The one who summoned them there is Seitenshi, in regards to destroying the host Gastrea and recovering the contents of the case that's inside the Gastrea.

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.

The Tendo Civil Security Agency gets a job from Seitenshi. The job is to act as her bodyguard. Rentaro isn't very fond of the idea, but notices odd activity when it's revealed that Seitenshi will be meeting with the head of the Osaka Area while Kikunojo is gone.

Seitenshi's vehicle is hit by a sniper while she in enroute to her meeting. Rentaro realizes this is more than a mere assassination attempt and gets help from Miori to find out more about the attack.