The story focuses on a group of 4 boys and 4 girls (later on 5) who met, when they were younger, in a realm full of darkness. A mysterious substance called Necrometal devours or infects anything that comes within a certain distant of a place called the Lightless realm. It starts at an ordinary school in a city of close proximity to the Lightless realm and focus's on Akashi for the most part. Akashi is no. 1 in the school when using the training bots to defeat schoolmates and is first seen fighting his best friend and defeating him. A man approaches him with an invitation to join a special force that is tasked with defeating the corpses and uncovering the secrets of the Lightless realm. Fast forward some time and a corpse appears which has the power to "kill" people who hear its song. It sings a lovely melody and like a countdown, over the next few months it is discovered that Emiru has become infected by the necrometal that has plagued the realm for so long. It is now up to Akashi to use the device known as the Reaper or MA-Vess in order to defeat the corpse and save everyone.
Directed by Junichi Sato (Sailor Moon) and written by Mari Okada (Lupin the Third: The Woman Called Fujiko Mine) the anime is now receiving a game adaptation for the Sony PS Vita gaming platform.
Bandai is said to be working on the project, expected to be an adventure game with a disjointed storytelling style. The game will switch between different perspectives for each of the eight Team Gargouille members with gamers having the ability to select a new character at the beginning of each chapter in the game.
It is expected for a a Japanese launch date of November 20.