Kishimu Eden no Grimm Reaper (Volume)

is the first volume of the Kishimu Eden no Grimm Reaper light novel series, written by Arata Takano and Illustrated by Senmu. It was released under the Dengeki Bunko Imprint in March 2014.

Synopsis
Confront the truth of the world with the beautiful ultimate weapons. Heroic dark action flowering! Funeral flower girl (Grim Reaper). It is the ultimate weapon that protects the world from the mysterious life form Legion. The human race, who was defeated by Legion, lived in a dome called Chrysalis, protected by burial flower girls. Katsumi, a high school student, is attacked by Legion who invaded the dome while rescuing the accident car. It was Iris, the leader of the Grim Reapers, who helped him. Iris, who acknowledged Katsumi's sense of justice, asks him for cooperation. Katsumi is confused, but decides to put herself into battle to protect his childhood friend Haruno. This is the last love story in the world, which blossoms by a boy and a girl with weapons.

(source: Bookwalker JP - Translated)